HARD
6th Tamil Nadu Board
IMPORTANT
Earn 100

The digits of the prime number 13 can be reversed to get another prime number 31. Find if any such pairs exist up to 100 .

Important Questions on Numbers

EASY
6th Tamil Nadu Board
IMPORTANT
Your friend says that every odd number is prime. Give an example to prove him/her wrong.
EASY
6th Tamil Nadu Board
IMPORTANT
Each of the composite numbers has atleast three factors. Justify this statement with an example.
MEDIUM
6th Tamil Nadu Board
IMPORTANT
Find the dates of any month in a calendar which are divisible by both 2 and 3.
EASY
6th Tamil Nadu Board
IMPORTANT
I am a two digit prime number and the sum of my digits is 10. I am also one of the factors of 57. Who am I?
MEDIUM
6th Tamil Nadu Board
IMPORTANT

Find the prime factorisation of given number by factor tree method and division method.

60

MEDIUM
6th Tamil Nadu Board
IMPORTANT

Find the prime factorisation of given number by factor tree method and division method.

128

MEDIUM
6th Tamil Nadu Board
IMPORTANT

Find the prime factorisation of given number by factor tree method and division method.

144

MEDIUM
6th Tamil Nadu Board
IMPORTANT

Find the prime factorisation of given number by factor tree method and division method.

198