6th Class Mathematics Knowing our Numbers Question Bank

done Number system and its Operations Total Questions - 40

• question_answer1)
  Which of the following statements is correct?
  A)
  In Indian numeration system, the number 81532598 is written, using Commas, as 81,532,598 done clear
  B)
  Numbers having more than two factors are called composite numbers. done clear
  C)
  The number 8929 rounded off to its nearest hundred is 9000. done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer2)
  The smallest five digit number with different digits is ___.
  A)
  98765 done clear
  B)
  12345 done clear
  C)
  10234 done clear
  D)
  18239 done clear
  E)
  None of these done clear
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• question_answer3)
  10 billion is equal to ______
  A)
  10 millions  done clear
  B)
  10000 millions done clear
  C)
  1000 crores  done clear
  D)
  Both B and C done clear
  E)
  None of these done clear
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• question_answer4)
  Population of Kanpur and Lucknow districts in the year 2011 was 45, 72, 951 and 45, 88, 455 respectively. What was the total population of the two districts in that year?
  A)
  81, 71, 576 done clear
  B)
  91, 61, 506 done clear
  C)
  91, 61, 406 done clear
  D)
  90, 79, 506 done clear
  E)
  None of these done clear
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• question_answer5)
  Which one of the following pairs is not co-prime?
  A)
  21, 22  done clear
  B)
  32, 33 done clear
  C)
  11, 14   done clear
  D)
  21, 24 done clear
  E)
  None of these done clear
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• question_answer6)
  The sum of the prime factors of 1155 is ____
  A)
  24  done clear
  B)
  26  done clear
  C)
  27   done clear
  D)
  29 done clear
  E)
  None of these done clear
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• question_answer7)
  A number is divisible by 3 and 12. The number may not be ____
  A)
  60  done clear
  B)
  450 done clear
  C)
  312  done clear
  D)
  288 done clear
  E)
  None of these done clear
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• question_answer8)
  The number nearest to 700000 which is exactly divisible by 11, 13, 15, 17 and 18 is ____.
  A)
  656370 done clear
  B)
  875160 done clear
  C)
  686370 done clear
  D)
  688570 done clear
  E)
  None of these done clear
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• question_answer9)
  If 3758925* is divisible by 11, then the digit at * is ___.
  A)
  2 done clear
  B)
  5 done clear
  C)
  4  done clear
  D)
  3 done clear
  E)
  None of these done clear
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• question_answer10)
  Identify the least Roman numerals from the following.

  MDCCCLXXXIX

  MCMLXXXI

  MCMXVIII

  MDLXVII

  MCDXCIX

  A)
  MDCCCLXXXIX  done clear
  B)
  MCDXCIX done clear
  C)
  MDLXVII  done clear
  D)
  MCMXVIII done clear
  E)
  None of these done clear
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• question_answer11)
  Which one of the following number is divisible by 77?
  A)
  3146 done clear
  B)
  1870 done clear
  C)
  2541 done clear
  D)
  3780 done clear
  E)
  None of these done clear
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• question_answer12)
  Which among the following statements is false for Roman numeration?
  A)
  A symbol is not repeated more than three times. done clear
  B)
  If a symbol is repeated, its value is multiplied as many times as it occurs, done clear
  C)
  The symbols V, L and D are never repeated. done clear
  D)
  The symbols V, L and D are never written to the left of a symbol of greater value. done clear
  E)
  None of these done clear
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• question_answer13)
  The product of the place values of two 7's in 4789765 is ______
  A)
  4900000 done clear
  B)
  49000000 done clear
  C)
  490000000 done clear
  D)
  49 done clear
  E)
  None of these done clear
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• question_answer14)
  A whole number is added to 69 and the same number is subtracted from 69. Find the sum of the resulting numbers.
  A)
  69  done clear
  B)
  128 done clear
  C)
  138 done clear
  D)
  0 done clear
  E)
  None of these done clear
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• question_answer15)
  Radius of the earth is 6,371 km and the radius of the Jupiter is 69911000 m whose radius is bigger and by how much?
  A)
  Jupiter, 6354 km done clear
  B)
  Jupiter, 63540 km done clear
  C)
  Earth, 6354 km done clear
  D)
  Earth, 354 km done clear
  E)
  None of these done clear
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• question_answer16)

  The procedure of the product of \[700\text{ }\times \text{ }6789\] by using distributive property is shown below:

  \[708\text{ }\times \text{ }6789\text{ }=\text{ }\left( 700\text{ }+\text{ }8 \right)\text{ }\times \text{ }6789\]\[=\text{ }\left( 700\text{ }\times \text{ }6789 \right)\text{ }+\text{ }\left( 8\text{ }\times \text{ }6789 \right)\]

  = (A) + 54312 = C

  Find the values of A and C.
  A)
  A = 4642300, C = 4805512 done clear
  B)
  A = 4752300, C = 4806612 done clear
  C)
  A = 4748300, C = 4608612 done clear
  D)
  A = 4652300, C = 4806412 done clear
  E)
  None of these done clear
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• question_answer17)
  The product of two consecutive whole numbers is always divisible by _______
  A)
  2 done clear
  B)
  3 done clear
  C)
  4  done clear
  D)
  8 done clear
  E)
  None of these done clear
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• question_answer18)
  It two given numbers are divisible by a number, then _____
  A)
  their sum is also divisible by that number done clear
  B)
  their difference is also divisible by that number done clear
  C)
  Both A and B are correct done clear
  D)
  Either A or B are correct done clear
  E)
  None of these done clear
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• question_answer19)
  Which one of the following numbers in Roman numerals is correct?
  A)
  CLDL done clear
  B)
  VDC done clear
  C)
  LDC   done clear
  D)
  CDLX done clear
  E)
  None of these done clear
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• question_answer20)
  The number, for which the sum of all its factors is equal to twice the number, is Called 3
  A)
  Super number done clear
  B)
  Super prime number done clear
  C)
  Perfect number done clear
  D)
  Perfect prime number done clear
  E)
  None of these done clear
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• question_answer21)
  If A = 15, B = 16 and C = 17, then which of the following is not true?
  A)
  \[\left( A\,\,+\,\,B \right)\,\,+\,\,C\,\,=\,\,A\,\,+\,\,\left( B\,\,+\,\,C \right)\] done clear
  B)
  \[\left( A\,\,\,\times \,\,\,B \right)\,\,\,\times \,\,C\,\,\,=\,\,\,A\,\,\times \,\,\,\left( B\,\,\times \,\,C \right)\] done clear
  C)
  \[A\text{ }+\text{ }\left( B\text{ }\times \text{ }C \right)\text{ }=\text{ }\left( A\text{ }\times \text{ }B \right)\text{ }+\text{ }\left( B\text{ }\times \text{ }C \right)\] done clear
  D)
  \[A\text{ }\times \text{ }\left( B\text{ }+\text{ }C \right)\text{ }=\text{ }\left( A\text{ }\times \text{ }B \right)\text{ }+\text{ }\left( A\text{ }\times \text{ }C \right)\] done clear
  E)
  None of these done clear
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• question_answer22)
  The largest number which always divides the product of the predecessor and successor of an odd natural number (other than 1) is __
  A)
  4  done clear
  B)
  6 done clear
  C)
  8 done clear
  D)
  7 done clear
  E)
  None of these done clear
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• question_answer23)
  The sum of the number 380598 and the number obtained by reversing its_____
  A)
  1267581 done clear
  B)
  1275681 done clear
  C)
  1276581 done clear
  D)
  1257681 done clear
  E)
  None of these done clear
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• question_answer24)
  Write the smallest four digit number by using one digit twice from 0, 8, 7,.
  A)
  7800 done clear
  B)
  0087 done clear
  C)
  7008 done clear
  D)
  7080 done clear
  E)
  None of these done clear
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• question_answer25)
  What must be subtracted from 1000011 to get 234569
  A)
  754842  done clear
  B)
  765432 done clear
  C)
  675432 done clear
  D)
  765442 done clear
  E)
  None of these done clear
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• question_answer26)
  A Garment factory produced 560738 Jeans, 160835 Trousers and some shirts. If total production of all three items in a year is 870703, then find the number of shirts produced in
  A)
  139209 done clear
  B)
  149129 done clear
  C)
  329139 done clear
  D)
  149139  done clear
  E)
  None of these done clear
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• question_answer27)
  In a six digit number digit at ten's place is 1 less than the digit at thousand's place and 2 more than the digit at ten thousand's place. Also the digit at hundred's place is 3 more than the digit at lakh's place. If digits at unit's lace, ten's place and lakh's place are 0, 2 and 3 respectively then write the number
  A)
  203620 done clear
  B)
  303620 done clear
  C)
  343620 done clear
  D)
  363020 done clear
  E)
  None of these done clear
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• question_answer28)
  Identify the wrong one in the following.
  A)
  1 lakh = 1000 hundreds done clear
  B)
  1 crore = 10,000 thousands done clear
  C)
  1 thousand = 1000 tens done clear
  D)
  10 crore = 1000 lakhs done clear
  E)
  None of these done clear
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• question_answer29)
  If a number is divisible by two co-prime numbers, _____
  A)
  the number is divisible by their product also. done clear
  B)
  the number may not divisible by their product. done clear
  C)
  the number is divisible by their sum. done clear
  D)
  the number is not divisible by their sum. done clear
  E)
  None of these done clear
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• question_answer30)
  Find the sum of the greatest and the least five digit numbers formed by 0, ______
  A)
  83268 done clear
  B)
  85467 done clear
  C)
  75498 done clear
  D)
  85487 done clear
  E)
  None of these done clear
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• question_answer31)
  In a survey over a town it was found that one out of every 27 persons is illiterate. If the population of the town was 495612, then how many illiterate persons were there in the town?
  A)
  18356 done clear
  B)
  19364 done clear
  C)
  17358 done clear
  D)
  18652 done clear
  E)
  None of these done clear
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• question_answer32)
  The number of common prime factors of 462, 378 and 546 is__
  A)
  1   done clear
  B)
  2          done clear
  C)
  3 done clear
  D)
  4 done clear
  E)
  None of these done clear
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• question_answer33)
  A mobile number consists of ten digits. First four digits are 9, 9, 9 and 9. The last three digits are 7, 8 and 9. The remaining digits are distinct and make the mobile number the greatest possible number. Find these digits.
  A)
  6, 5, 4 done clear
  B)
  6, 5, 0 done clear
  C)
  6, 5, 7 done clear
  D)
  5, 6, 4 done clear
  E)
  None of these done clear
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• question_answer34)
  Evaluate: \[\left[ \left\{ \left( 364\times 8 \right)+85 \right\}-3474\div 9 \right]+3\]\[\times 15\] - 5
  A)
  2620 done clear
  B)
  7833 done clear
  C)
  1620 done clear
  D)
  6833 done clear
  E)
  None of these done clear
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• question_answer35)
  A box Contains 5 strips having 16 Capsules of 250 mg medicine in each Capsule. Find the total weight of medicine (in grams) in 24 such boxes.
  A)
  480000 done clear
  B)
  380000 done clear
  C)
  480 done clear
  D)
  380 done clear
  E)
  None of these done clear
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• question_answer36)
  The greatest four digit number, which is exactly divisible by 12, 22, 32 and 3D IS________.
  A)
  3268 done clear
  B)
  9504 done clear
  C)
  3168 done clear
  D)
  9904 done clear
  E)
  None of these done clear
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• question_answer37)
  The floor of a room is 10 m 25 cm long and 8 m 75 cm broad. Find the least number of square tiles of the same size for covering the whole floor.
  A)
  1235 done clear
  B)
  1435 done clear
  C)
  1870  done clear
  D)
  2470 done clear
  E)
  None of these done clear
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• question_answer38)
  How many two-digit prime numbers are there, which on reversing their digits remain prime still?
  A)
  3 done clear
  B)
  7 done clear
  C)
  11 done clear
  D)
  9 done clear
  E)
  None of these done clear
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• question_answer39)
  Which of the following statements is not correct?
  A)
  All whole numbers are integers. done clear
  B)
  Zero is not an integer, as it is neither positive nor negative. done clear
  C)
  The successor of the integer 1 is not 0. done clear
  D)
  The sum of an integer and its additive inverse is always zero, done clear
  E)
  None of these done clear
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• question_answer40)
  The sum of successor and predecessor of -1 is _____
  A)
  0 done clear
  B)
  -1 done clear
  C)
  -2 done clear
  D)
  1 done clear
  E)
  None of these done clear
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