Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

When is the top of a mountain similar to a savings account?

What has 13 hearts but no other organs?

Why are all black people so quick ?