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?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

Solve the alphametic puzzle by replacing the alphabet with the number.

S T O R M +
S O L E S
=========
T O W E L
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What month of the year has 28 days?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

What occurs twice in a week, once in a year but never in a day?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

What does this rebus riddle mean?