What number when divided in half becomes zero?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Find the 8 in the below-given Image.

Ten coins have been arranged as you can see in the given picture. In this arrangement, a triangle is formed pointing upwards. You have to invert the position of the triangle and make it point downwards while changing the position of 3 coins only. Can you do it?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

What is harder to catch the faster you run?

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?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT