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# HCF-LCM || 19.01.2021

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Question 1

The HCF of (x6−1) and (x4+2x3−2x−1) is:

Question 2

If A and B are the HCF and LCM respectively of two algebraic expression x and y, and A + B = x + y, then the value of A3 + B3 is:

Question 3

Find the least number which when divided by 5, 6, 7 and 8 leaves a remainder 3, but when divided by 9 leaves no remainder.

Question 4

What is greatest four digit number which is completely divisible by 9, 12, 24 and 32?

Question 5

L.C.M of two numbers is 594 and their product is 3564. If respective ratio of both numbers is 9:11 then what is sum of numbers?

Question 6

HCF and LCM of two numbers are 19 and 969 respectively. If one number is 57 find the other Number.

Question 7

Find the HCF of (4315 − 1) and (425 − 1):

Question 8

Find that least perfect square number which is exactly divisible by 18, 56 and 72:

Question 9

Four bells ring at an interval of 4, 6, 8 and 14 seconds respectively. They start ringing simultaneously at 12:00 O’clock. At what time will they again ring simultaneously.

Question 10

If P = 23×37×51×75, Q = 23×32×53×712×81 and R = 25×42×513×71×92Then HCF of P, Q and R is:
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