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?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

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

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

What is next number in the pattern below:

131 517 192 123 ?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

How do you go from 98 to 720 using just one letter?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.