What divided by 2 equals 21?
What divided by 2 equals 21? In other words, you have an unknown number (X), and then if you divide that X by 2 you get 21. Then what is that X?
The equation to calculate what divided by 2 equals 21 is as follows:
X/2 = 21
Where X is the answer. When we solve the equation by multiplying each side by 2, you get get:
X = 42
Therefore, the answer to what divided by 2 equals 21 is 42.
You can prove this by taking 42 and dividing it by 2, and you will see that the answer is 21.
Tip: For future reference, when you are presented with a problem like "What divided by 2 equals 21?", all you have to do is multiply the two known numbers together.