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?

You need to arrange three 7 and mathematical symbols to form number 1?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What's a single-digit number with no value?

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111