Replace the question mark with the correct number in below Picture:

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

How many triangles can you count in the figure given?

John bought 150 chocolates but he misplaced some of them. His Father asked him how many chocolates were misplaced.
He gave the following answer to him:
If you count in pairs, one remains
If you count in threes, two remain
If you count in fours, three remain
If you count in fives, four remain
If you count in sixes, five remain
If you count in sevens, no chocolate remains.

Can you analyze the statements and tell us how many chocolates were lost?

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

In the picture given below, can you find out which digit will take place of the question mark?

What is the next number in the series?

15 29 56 108 208 ?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?