What has hands, but can’t clap?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

What is at the end of a rainbow?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?