You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

1. Where does Easter come from before Valentine's Day?

2. Do you know what is in the middle of Valentine's?

3. What did the lady bee say to the man bee on the occasion of Valentine's Day