Can you find out who is the kidnapper in below Picture and why, Explain ?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

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 ?

How can you make number one disappear by adding something to it?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

I have branches, but no fruit, trunk or leaves. What am I?

Can you identify the hidden rebus in the image below?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

What do you see in the given picture?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?