question_answer1) Which of the following number is a perfect Number?
A) 20 done clear
B) 26 done clear
C) 28 done clear
D) 25 done clear
View Solution play_arrowquestion_answer2) The number of prime Numbers between 1 to 100
A) 24 done clear
B) 26 done clear
C) 25 done clear
D) 28 done clear
View Solution play_arrowA) 1 done clear
B) 2 done clear
C) 6 done clear
D) 9 done clear
View Solution play_arrowquestion_answer4) Every counting number has an infinite number of
A) Factor done clear
B) Multiples done clear
C) Prime factor done clear
D) None of these done clear
View Solution play_arrowquestion_answer5) The number of factors of 1080 is
A) 32 done clear
B) 28 done clear
C) 24 done clear
D) 36 done clear
View Solution play_arrowquestion_answer6) Which of the following is pair of twin primes between 50 and 70?
A) 51, 53 done clear
B) 57, 59 done clear
C) 59, 61 done clear
D) 63, 65 done clear
View Solution play_arrowA) 33 done clear
B) 23 done clear
C) 47 done clear
D) 37 done clear
View Solution play_arrowquestion_answer8) The greatest common factor of 120 and 192 is
A) 12 done clear
B) 2 done clear
C) 3 done clear
D) 24 done clear
View Solution play_arrowquestion_answer9) If \[x\]and \[y\]are two co-primes, then their LCM is
A) \[xy\] done clear
B) \[x+y\] done clear
C) \[x\] done clear
D) \[1\] done clear
View Solution play_arrowquestion_answer10) Product of two co-primes numbers is 117 their LCM should be
A) 1 done clear
B) 117 done clear
C) Equal to their HCF done clear
D) Cannot be calculated done clear
View Solution play_arrowquestion_answer11) A number N is divisible by both 8 and 12. Then N shall be divisible by
A) 24 done clear
B) 48 done clear
C) 96 done clear
D) All of these done clear
View Solution play_arrowquestion_answer12) Consider the following statement
I. N is divisible by 8 for any value of n |
II. N is divisible by 6 for any value of n. |
A) Only I done clear
B) Only II done clear
C) Both I and II done clear
D) Neither I nor II done clear
View Solution play_arrowI. a must be a prime |
II. a, c must be co-prime. |
A) Only I done clear
B) Only II done clear
C) Both I and II done clear
D) Neither I nor II done clear
View Solution play_arrowI. N is divisible by 16 |
II. N is divisible by 11 |
A) Only I done clear
B) Only II done clear
C) Both I and II done clear
D) Neither I nor II done clear
View Solution play_arrowquestion_answer15) The ratio of two numbers is \[3:4\] and their HCF is 4. Their LCM is
A) 12 done clear
B) 16 done clear
C) 24 done clear
D) 48 done clear
View Solution play_arrowA) 101 done clear
B) 107 done clear
C) 111 done clear
D) 185 done clear
View Solution play_arrowA) \[22\times 32\times 5\] done clear
B) \[25\times 34\times 52\] done clear
C) \[23\times 32\times 5\times 7\times 11\] done clear
D) \[25\times 34\times 53\times 72\times 11\] done clear
View Solution play_arrowA) 10 done clear
B) 46 done clear
C) 70 done clear
D) 90 done clear
View Solution play_arrowquestion_answer19) Find the No. of factors of 15625
A) 7 done clear
B) 8 done clear
C) 9 done clear
D) 20 done clear
View Solution play_arrowquestion_answer20) The LCM of two numbers is 1200. Which of the following cannot be their HCF
A) 600 done clear
B) 500 done clear
C) 400 done clear
D) 200 done clear
View Solution play_arrowA) an Even number done clear
B) an odd number done clear
C) an odd prime number done clear
D) a prime number done clear
View Solution play_arrowA) 28 done clear
B) 32 done clear
C) 36 done clear
D) 40 done clear
View Solution play_arrowA) \[-2\] done clear
B) \[-1\] done clear
C) \[1\] done clear
D) \[2\] done clear
View Solution play_arrowA) 6 done clear
B) 8 done clear
C) 10 done clear
D) 12 done clear
View Solution play_arrowquestion_answer25) A number n has 10 factors. Now consider the following statements.
(I) n can be a perfect square |
(II) n is divisible by three distinct primes |
A) Only I done clear
B) Only II done clear
C) Both I and II done clear
D) Neither I nor II done clear
View Solution play_arrowA) \[pq\] done clear
B) \[{{p}^{3}}{{q}^{3}}\] done clear
C) \[{{p}^{3}}{{q}^{2}}\] done clear
D) \[{{p}^{2}}{{q}^{2}}\] done clear
View Solution play_arrowquestion_answer27) If the LCM of \[a\]and 18 is 36 and the HCF of \[a\] and 18 is 2, then a=?
A) 2 done clear
B) 3 done clear
C) 4 done clear
D) 1 done clear
View Solution play_arrowquestion_answer28) If n is a natural number, then \[{{9}^{2n}}-{{4}^{2n}};\] is divisible by
A) 5 done clear
B) 13 done clear
C) both 5 and 13 done clear
D) None of these done clear
View Solution play_arrowquestion_answer29) If n is any natural number, then \[{{6}^{n}}-{{5}^{n}}\]always ends with
A) 1 done clear
B) 3 done clear
C) 5 done clear
D) 7 done clear
View Solution play_arrowA) 203400 done clear
B) 194400 done clear
C) 198400 done clear
D) 205400 done clear
View Solution play_arrowA) 6, 718, 464 done clear
B) 60,418, 464 done clear
C) 70, 416, 246 done clear
D) 7, 842, 321 done clear
View Solution play_arrowA) \[11:56\,am\] done clear
B) \[12:04\,pm\] done clear
C) \[11:04\,am\] done clear
D) \[11:48\,am\] done clear
View Solution play_arrowquestion_answer33) The LCM of \[\frac{a}{b},\,\,\frac{c}{d},\,\,\frac{e}{f}\] is equal to
A) \[\frac{L.C.M\text{ }of\text{ }a.c.e}{H.C.F\text{ }of\text{ }b.d.f}\] done clear
B) \[\frac{H.C.F\text{ }of\text{ }b.d.f}{L.C.M\text{ }of\text{ }a.c.e}\] done clear
C) \[\frac{H.C.F\text{ }of\text{ }a,c,e~}{H.C.F\text{ }of\text{ }b,d,f}\] done clear
D) \[\frac{ace}{bdf}\] done clear
View Solution play_arrowA) 5 done clear
B) 6 done clear
C) 7 done clear
D) 8 done clear
View Solution play_arrowA) 962 done clear
B) 692 done clear
C) 269 done clear
D) 629 done clear
View Solution play_arrowA) 1443 done clear
B) 1476 done clear
C) 1480 done clear
D) 1483 done clear
View Solution play_arrowA) 1 done clear
B) 2 done clear
C) 6 done clear
D) 5 done clear
View Solution play_arrowA) 11 done clear
B) 13 done clear
C) 17 done clear
D) 19 done clear
View Solution play_arrow(i) 2 | (ii) 11 | (iii) 9 |
A) Either (i) or (ii) done clear
B) Either (ii) or (iii) done clear
C) Either (i) or (ii) or (iii) done clear
D) None of these done clear
View Solution play_arrowquestion_answer40) LCM of two integers x and y is 311 what is the HCF of \[x\]and\[y\]?
A) 37 done clear
B) 1 done clear
C) 3 done clear
D) Cannot be determine done clear
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