HCF and LCM Questions and Answers for Practice
The product of two numbers is 20736 and their HCF is 54. Find their LCM.
(A) 685
(B) 468
(C) 648
(D) 384
Correct Answer : D
What is the LCM (least common multiple) of 57 and 93?
(A) 1576
(B) 1767
(C) 1567
(D) 1919
Correct Answer : B
The LCM of two numbers is 495 and their HCF is 5. If the sum of the numbers is 100, then their difference is-
(A) 10
(B) 46
(C) 70
(D) 90
Correct Answer : A
The HCF and LCM of two numbers are 3 and 2730 respectively. If one of the numbers is 78, find the other number.
(A) 107
(B) 103
(C) 105
(D) 102
Correct Answer : C
a and b are two whole numbers and c is their HCF, then the LCM of those two numbers is
(A) ab/c
(B) abc
(C) bc
(D) ac/b
Correct Answer : A
The HCF of two numbers is 4 and the two other factors of LCM are 5 and 7. Find the smaller of the two numbers.
(A) 10
(B) 14
(C) 20
(D) 28
Correct Answer : C
What is the Highest Factor of $$ {2^{3}×{3^{5}}} and \ {2^{3}×{3^{5}}}$$ ?
(A) $$ {2^{3}×{3^{5}×{5^{2}}}}$$
(B) $$ {3^{3}} $$
(C) $$ {2^{1}×{3^{3}×{5^{1}}}}$$
(D) $$ {{3^{5}×{5^{2}}}}$$
Correct Answer : B
The HCF of 156, 312 and 195 is :
(A) 39
(B) 3
(C) 78
(D) 13
Correct Answer : A
The sum of two numbers is 232 and their HCF is 29. What is the numbers of such pairs of numbers satisfied the above condition?
(A) 0
(B) 2
(C) 3
(D) 1
Correct Answer : B
The product of two numbers is 2028 and their HCF is 13. The number of such pair is-
(A) 1
(B) 2
(C) 3
(D) 4
Correct Answer : B
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