What is more useful when it is broken?

I am a mother. However, I never give birth.

I am a father. However, I never nurse my children.

Wandering is not possible for me, but standing still happens occurs rarely.

Who am I?

If a wheel has 54 spokes, how many spaces are there between the spokes?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

What demands an answer, but asks no questions

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

A Car is crossing a bridge 2 miles long. The bridge can only hold 10000 lbs, which is the exact weight of the car. The Car makes it half way across the bridge and stops. A bird lands on the car. Does the bridge collapse? Explain.

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

When is the top of a mountain similar to a savings account?