I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

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

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Can you find the thief by just looking at the picture below?

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

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

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)

Solve the puzzle by telling what does below picture means.