Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

When can we add 2 to 11 and get 1 as the correct answer?

What has one eye, but can’t see?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

What happened when the wheel was invented?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

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?

A bank customer had $100 in his account. He then made 6 withdrawals. He kept a record of these withdrawals, and the balance remaining in the account, as follows:

Withdrawals Balance left
$50 $50
$25 $25
$10 $15
$8 $7
$5 $2
$2 $0
----- -----
$100 $99

Why are the Totals not tallying?

Why did Buffon take the goal with him after every Juventus match?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?