Find the number of squares in the below picture

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

Find the next number in the series.
1 10 24 43 67 ?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

Can you divide the below-given shape into four equal and identical pieces?

What does this rebus means ?

PROG WORKRESS

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

The more of this there is, the less you see. What is it?

What number comes next in the series?

5 15 5 18 5 24 14 20 _