Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Find the number of squares in the below picture

You see me once in June, twice in November, and not at all in May. What am I?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

When we see 2 but call 10?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Forwards I am heavy, backward I am not. What am I?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?