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

Rearrange the letters in "new door" to make one word.

What number when divided in half becomes zero?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

You can use any mathematical symbols in the space provided to make all above algebraic expressions true.

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Take one out and scratch my head, I am now black but once was red. What am I?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?