While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

What part of the chicken has the most feathers?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

What has lots of eyes, but can’t see?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Why is Saturday stronger than Monday?