A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Find the missing number in the sequence below:

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

When can we add 2 to 11 and get 1 as the correct answer?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

People make me, save me, change me, raise me. What am I?

Can you find out the total number of triangles in the given figure?

Rearrange the letters in "new door" to make one word.

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?