With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

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

You need to move three matchsticks to form three squares. Can you do it?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What's a single-digit number with no value?

Find the number of squares in the below-given picture.

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

Why is the Hole below a Lock?