In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

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

When can we add 2 to 11 and get 1 as the correct answer?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.