John was born on March 5, 1970, in Delhi, India. Jacob was born 25 days before John. The year when they took birth, Republic Day fell on Monday.

Can you find out on what day was Jacob born?

I shave every day, but my beard stays the same. What am I?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

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

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Can you make a fire with just a single stick?

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?