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?

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

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

If you say my name, I will no longer exist. What am I?

Which is heavier: a ton of bricks or a ton of feathers?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??