In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

What am I?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Give it food and it will live; give it water and it will die.

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?