What always comes into a house through the keyhole?

Jack was having a candle light dinner with his girlfriend. Suddenly a cold gush of wind entered through the open window and three of the ten candles were extinguished. Assuming that none of the other candles were extinguished.

How many candles are they left with in the end ?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

What can you serve, but never eat?

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What does this mathematical rebus means ?