HCF and LCM Questions with Answers for Competitive Exam

HCF and LCM Aptitude Questions

41. If LCM of two number is 693, HCF of two numbers is 11 and one number is 99, then find other
(A) 34
(B) 77
(C) 12
(D) 45
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Ans .  B

 
 
42. What will be the LCM of 8, 24, 36 and 54
(A) 54
108
216
432
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Ans .  C

 
 
43. HCF of 22×32×52, 24×34×53×11 is
(A) 24×34×53
(B) 24×34×53×11
(C) 22×32×52
(D) 2×3×5
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Ans .  C

 
 
44. Six bells commence tolling together and toll at the intervals of 2,4,6,8,10,12 seconds resp. In 60 minutes how many times they will toll together.
(A) 15
(B) 16
(C) 30
(D) 31
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Ans .  D

 
 
45. Find the HCF of  22×32×72,2×34×7
(A) 128
(B) 126
(C) 146
(D) 434
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Ans .  B

 
 
46. Reduce 368575 to the lowest terms.
(A) 3025
(B) 2829
(C) 2829
(D) 1625
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Ans .  D

 
 
47. The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is
(A) 48
(B) 22
(C) 56
(D) 27
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Ans .  A

 
 
48. Find the greatest number which on dividing 1661 and 2045, leaves a reminder of 10 and 13 respectively
(A) 125
(B) 127
(C) 129
(D) 131
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Ans .  B

 
 
49. Find the largest number which divides 62,132,237 to leave the same reminder
(A) 30
(B) 32
(C) 35
(D) 45
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Ans .  C

 
 
50. Find the greatest number that will divide 400, 435 and 541 leaving 9, 10 and 14 as remainders respectively
(A) 19
(B) 17
(C) 13
(D) 9
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Ans .  B

 
 
51. Find the HCF of 2.1, 1.05 and 0.63
(A) 0.44
(B) 0.64
(C) 0.21
(D) None of above
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Ans .  C