If 21x = 79x, what is the value of x?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

The Puzzle: Here is a famous prize problem that Sam Loyd issued in 1882, offering $1000 as a prize for the best answer showing how to arrange the seven figures and the eight 'dots' .4.5.6.7.8.9.0. which would add up to 82

Solve below popular number sequence
314 159 265 358 979 323 846 ?

How many triangles are there on the puzzle below?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

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

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

Solve the mathematical equation in the picture below.