What runs around the whole yard without moving?

Can you count the number of triangles in the picture below?

If 1+9+8=1, what is 2+8+9?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

What question can you never answer yes to?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?