Solve below rebus puzzle?

Find the next number in the sequence

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

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

A container contains 100 eggs. They can be either fresh or rotten. What is sure is the fact that there is at least one fresh egg in that container.

If you are asked to pick two eggs randomly from the container, at least one of them will be rotten.

Can you calculate how many eggs in that container are fresh?

Six people park their car in an underground parking of a store. The store has six floors in all. Each one of them goes to a different floor. Simon stays in the lift for the longest. Sia gets out before Peter but after Tracy. The first one to get out is Harold. Debra leaves after Tracy who gets out on the third floor.

Can you find out who leaves the lift on which floor?

Can you fill the blank with the correct number?

6 30 870 756030 _____

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?