What work can one never finish?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

why number 8549176320 is one of a kind?

Find the next number in the following series:
6, 14, 26, 98, __?

Count the number of balls in picture below:

Count the number of triangles in the given picture.

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?