What has many keys but can’t open a single lock?

A bomb exploded in a room full of married couples and no one died. How?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

In the picture given below, can you find out which digit will take place of the question mark?

Can you solve the below geography rebus by decoding the below rebus ?

Can you replace the question mark with the correct number in the below table sequence?

How is the moon similar to a dollar?