There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

I look at you, you look at me I raise my right, you raise your left. What am I?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

What does this rebus riddle means ?

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?