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

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Can you find out which number multiplied by itself will give the output as 12345678987654321?