What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

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

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Using Only Five 5's and any mathematical operator make sum as 37

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

While preparing the table for dinner, wife came up with an idea to tease his mathematician husband. She asked her husband to pick nine toothpicks and make ten without breaking any toothpick.

The husband was also smart and did it within seconds. How ?

Which is faster, Heat or Cold ? Explain.