Why is 6 afraid of 7?

Why is the Hole below a Lock?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

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

When monkey rotate the gear, which mark will be hit 1 or 2 ?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

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?

What is harder to catch the faster you run?

Find the last number in the series below:

voN luJ yaM raM ---