Tamil Nadu Board Solutions for Chapter: Numbers, Exercise 5: Exercise 1.1

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?

If there are $143$ math books to be arranged in equal numbers in all the stacks, then find the number of books in each stack and also the number of stacks.

The sum of the factors of $27$ is

The factors of a number are $1, 2, 4, 5, 8, 10, 16, 20, 40$ and $80$. What is the number?

The prime factorisation of $60$ is $2\times 2\times 3\times 5$. Any other number which has the same prime factorisation as $60$ is

If the number $6354*97$ is divisible by $9$, then the value $*$ is

The number $87846$ is divisible by

Find the LCM of $156$ and $124$.