Can you find the thief by just looking at the picture below?

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?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?