Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

What Adam and Eve do not have but the rest of the people have?

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.

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

What do you get if you add 2 to 100 four times?

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

Can you find a rabbit in the given picture?

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