How many times can you subtract the number 5 from 25?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

What Deficiency does the below rebus represent?

VIT_MIN

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?

Prove that the below maths equation is true.

8 + 8 = 91

Can you solve below mathematical equation?

2^1234 - 2^1233

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

why number 8549176320 is one of a kind?

If two's company, and three's a crowd, then whats four and five ?