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

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

What do you see in the image below

I have an apple tree , number of apple in this tree get doubles every week.

On 30th week , the tree gets completely filled with apples :-)



Can you tell me , on what week does my tree is half covered with apples ?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

No matter how little or how much you use me, you change me every month. What am I?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

Keyboard words are not in alphabetical order, Why?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?