What number comes next in the series?

5 15 5 18 5 24 14 20 _

Can you count the number of quadrilaterals in the picture below?

Why is the Hole below a Lock?

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?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

How many letters are in the alphabet?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

A game is being played where eight players can last for thirty-five minutes. Six substitutes alternate with each player in this game. Thus, all players are on the pitch for the same amount of time including the substitutes.

For how long is each player on the pitch?

Can you count the number of squares in the figure below?

By what process could you make a 'Tea-Table' into food?