Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

You can see three almost identical images below. Can you spot the odd one out from them?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

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

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

If eleven plus two equals one, what does nine plus five equal?

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?