Can you make four (4) nines (9) equal 100?

Can you find the mistake in the below statement?

What does this mean?

CCCCCCC

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

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

Give it food and it will live; give it water and it will die.

What does this below rebus puzzle mean?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?