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

Can you find out which number multiplied by itself will give the output as 12345678987654321?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

If a wheel has 54 spokes, how many spaces are there between the spokes?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

Count the number of triangles in the picture below:

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 country can make you shiver?