If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

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?

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

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

What have one eye but still cannot see?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?

Can you Find and name the hidden bird in the picture below ?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).