What has no start, end, or centre?

A sundial has the fewest moving parts of any timepiece. Which has the most?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

The cream is heavier than Milk. True or False?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?