As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

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).

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Take away the whole and some still remain. What is it?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

What is the coolest letter in the alphabet?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?