What is at the end of a rainbow?

Which word does the below Plexor means ?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

Two friends were stuck in a cottage. They had nothing to do and thus they started playing cards. Suddenly the power went off and Friend 1 inverted the position of 15 cards in the normal deck of 52 cards and shuffled it. Now he asked Friend 2 to divide the cards into two piles (need not be equal) with equal number of cards facing up. The room was quite dark and Friend 2 could not see the cards. He thinks for a while and then divides the cards in two piles.

On checking, the count of cards facing up is same in both the piles. How could Friend 2 have done it ?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?