EASY
6th CBSE
IMPORTANT
Earn 100

There are  pairs of twin primes in the first 100 natural numbers.

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Important Questions on Playing with Numbers

EASY
6th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 3 - Playing with Numbers>REVIEW EXERCISES>Q 4
A number is divisible by _____ if the number formed by its last two digits is divisible by it.
EASY
6th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 3 - Playing with Numbers>REVIEW EXERCISES>Q 5
Two prime numbers are called _____ primes of n if their average is n. (Symmetric/Asymmetric)
EASY
6th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 3 - Playing with Numbers>REVIEW EXERCISES>Q 1

What are the first three multiples of 7? 

EASY
6th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 3 - Playing with Numbers>REVIEW EXERCISES>Q 2

What is the smallest factor of 64?

EASY
6th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 3 - Playing with Numbers>REVIEW EXERCISES>Q 3

Answer in one Word or a Line

Which is the smallest odd prime number?
MEDIUM
6th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 3 - Playing with Numbers>REVIEW EXERCISES>Q 4

Answer in one Word or a Line

Are two co-prime numbers always prime? is the converse true?
MEDIUM
6th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 3 - Playing with Numbers>REVIEW EXERCISES>Q 5
What is the LCM of two co-prime numbers a and b?
EASY
6th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 3 - Playing with Numbers>REVIEW EXERCISES>Q 6
Which is greater, HCF or LCM of two numbers? Why?