HARD
6th CBSE
IMPORTANT
Earn 100

Find two possible pairs of numbers such that the HCF and LCM of each pair of numbers are 21 and 630, respectively.

Important Questions on HCF and LCM

MEDIUM
6th CBSE
IMPORTANT
CPA Maths - A Singapore Approach>Chapter 4 - HCF and LCM>EXERCISE>Q 1
The HCF and LCM of 25 and another number are 5 and 75, respectively. Find the other number.
MEDIUM
6th CBSE
IMPORTANT
CPA Maths - A Singapore Approach>Chapter 4 - HCF and LCM>EXERCISE>Q 2
The product of two numbers is 336. If their HCF is 4, find their LCM.
MEDIUM
6th CBSE
IMPORTANT
CPA Maths - A Singapore Approach>Chapter 4 - HCF and LCM>EXERCISE>Q 3
For two given numbers, LCM×HCF=2880. If first number is 12, find the second number.
MEDIUM
6th CBSE
IMPORTANT
CPA Maths - A Singapore Approach>Chapter 4 - HCF and LCM>EXERCISE>Q 4
The LCM of two numbers is 80 and their product is 640. Find their HCF.
MEDIUM
6th CBSE
IMPORTANT
CPA Maths - A Singapore Approach>Chapter 4 - HCF and LCM>EXERCISE>Q 5
The HCF of 120 and another number is 40. If their LCM is 240, find the other number.
MEDIUM
6th CBSE
IMPORTANT
CPA Maths - A Singapore Approach>Chapter 4 - HCF and LCM>REVIEW EXERCISE>Q 1
Find the smallest number that has 2, 5 and 7 as its prime factors.
MEDIUM
6th CBSE
IMPORTANT
CPA Maths - A Singapore Approach>Chapter 4 - HCF and LCM>REVIEW EXERCISE>Q 2
Find the prime factorisation of the greatest three-digit number.
MEDIUM
6th CBSE
IMPORTANT
CPA Maths - A Singapore Approach>Chapter 4 - HCF and LCM>REVIEW EXERCISE>Q 3

Determine whether the following number is prime or composite.

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