A) 72 done clear
B) 60 done clear
C) 62 done clear
D) 42 done clear
View Solution play_arrowA) 9 done clear
B) 6 done clear
C) 7 done clear
D) 1 done clear
View Solution play_arrowquestion_answer3) The number (11, 13) are ________ numbers.
A) Co-prime done clear
B) Prime done clear
C) Both prime and co-prime done clear
D) None of these done clear
View Solution play_arrowA) 1394 done clear
B) 1404 done clear
C) 1664 done clear
D) 1406 done clear
View Solution play_arrowquestion_answer5) The HCF of two consecutive odd numbers is
A) 2 done clear
B) 0 done clear
C) 4 done clear
D) 1 done clear
View Solution play_arrowA) 64 done clear
B) 84 done clear
C) 34 done clear
D) 92 done clear
View Solution play_arrowquestion_answer7) A number which has more than two factors is called a
A) Composite number done clear
B) Even number done clear
C) Odd number done clear
D) Prime number done clear
View Solution play_arrowquestion_answer8) Observe the following patterns. Then find the sum of 1+3+5+7+9+...+19.
1 | \[=1\times 1=1\] |
1+3 | \[=2\times 2=4\] |
1+3+5 | \[=3\times 3=9\] |
1+3+5+7 | \[=4\times 4=16\] |
1+3+5+7+9 | \[=5\times 5=25\] |
A) 121 done clear
B) 81 done clear
C) 100 done clear
D) 64 done clear
View Solution play_arrowA) 1 done clear
B) 0 done clear
C) Always an even number done clear
D) Can't be determined done clear
View Solution play_arrowA) 9660, 10080 done clear
B) 9320, 10080 done clear
C) 9660, 10060 done clear
D) 10340, 10080 done clear
View Solution play_arrowquestion_answer11) The co-prime numbers from the following pairs, are _________.
A) 7 and 63 done clear
B) 36 and 25 done clear
C) 35 and 21 done clear
D) 63 and 81 done clear
View Solution play_arrowquestion_answer12) Which of the following numbers has exactly 4 factors?
A) 16 done clear
B) 14 done clear
C) 18 done clear
D) None of these done clear
View Solution play_arrowquestion_answer13) HCF of the two numbers =
A) Product of numbers + their LCM done clear
B) Product of numbers - their LCM done clear
C) Product of numbers x their LCM done clear
D) Product of numbers - their LCM done clear
View Solution play_arrowquestion_answer14) A number is always divisible by 90, if________.
A) It is divisible by both 2 and 45 done clear
B) It is divisible by both 5 and 18 done clear
C) It is divisible by both 9 and 10 done clear
D) All of these done clear
View Solution play_arrowquestion_answer15) The reciprocal of the smallest prime number is _________.
A) 0 done clear
B) \[\frac{1}{2}\] done clear
C) 1 done clear
D) 2 done clear
View Solution play_arrowquestion_answer16) The two numbers which have only 1 as their common factor are called _________.
A) Co-primes done clear
B) Twin primes done clear
C) Composite done clear
D) Even numbers done clear
View Solution play_arrowquestion_answer17) If 5476a is divisible by 3, then what can be the least value of a?
A) 1 done clear
B) 2 done clear
C) 3 done clear
D) 6 done clear
View Solution play_arrowA) 16 done clear
B) 48 done clear
C) 57 done clear
D) 39 done clear
View Solution play_arrowA) 9 done clear
B) 8 done clear
C) 7 done clear
D) 3 done clear
View Solution play_arrowA) 144 done clear
B) 120 done clear
C) 80 done clear
D) 64 done clear
View Solution play_arrowA) 15 done clear
B) 23 done clear
C) 17 done clear
D) 20 done clear
View Solution play_arrowA) 30 tiles done clear
B) 15 tiles done clear
C) 25 tiles done clear
D) 45 tiles done clear
View Solution play_arrowA) 6930cm done clear
B) 6000cm done clear
C) 7000cm done clear
D) 6520cm done clear
View Solution play_arrowA) 170 litres done clear
B) 85 litres done clear
C) 34 litres done clear
D) 10 litres done clear
View Solution play_arrowA) 31 cm done clear
B) 30 cm done clear
C) 25cm done clear
D) 35cm done clear
View Solution play_arrowquestion_answer26) State T for true and 'F' for false.
(i) If an even number is divided by 2, the quotient is always odd. |
(ii) All even numbers are composite numbers. |
(iii) The LCM of two co-prime numbers cannot be equal to their product. |
(iv) Every number is a factor of itself. |
A)
(i) | (ii) | (iii) | (iv) |
T | T | F | F |
B)
(i) | (ii) | (iii) | (iv) |
F | F | F | T |
C)
(i) | (ii) | (iii) | (iv) |
T | F | T | T |
D)
(i) | (ii) | (iii) | (iv) |
F | F | T | T |
question_answer27) Read the following statements.
Statement 1: A number for which sum of all its factors is equal to twice the number is called perfect number. |
Statement 2: If two numbers are divisible by a number, then their sum and difference are also divisible by that number. |
A) Both Statement-1 and Statement-2 are true. done clear
B) Statement-1 is true but Statement-2 is false. done clear
C) Statement-1 is false but Statement-2 is true. done clear
D) Both Statement-1 and Statement-2 are false. done clear
View Solution play_arrowquestion_answer28) Fill in the blanks.
(i) The HCF of two co-prime numbers is P . |
(ii) Two natural numbers which have no common factor except 1 are called Q numbers. |
(iii) If a number is divisible by 9 then sum of its digits must be divisible by R . |
A)
P | Q | R |
1 | prime | 3 |
B)
P | Q | R |
1 | co-prime | 9 |
C)
P | Q | R |
0 | prime | 9 |
D)
P | Q | R |
0 | co-prime | 3 |
A) 7 done clear
B) 6 done clear
C) 0 done clear
D) 9 done clear
View Solution play_arrowquestion_answer30) Match the following.
Column I | Column II |
(i) 49 | (p) Multiple of 3 |
(ii) 25 | (q) Multiple of 4 |
(iii) 16 | (r) Multiple of 7 |
(iv) 39 | (s) Multiple of 5 |
A)
(i) | (ii) | (iii) | (iv) |
S | p | r | q |
B)
(i) | (ii) | (iii) | (iv) |
r | s | q | p |
C)
(i) | (ii) | (iii) | (iv) |
s | r | p | q |
D)
(i) | (ii) | (iii) | (iv) |
p | q | r | s |
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