A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Find the number of squares in the below picture

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

What time is it when an elephant sits on a fence?

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

Which tank will fill first?

What is the probability of choosing the correct answer at random from the options below?

a) 1/4
b) 1/2
c) 1
d) 1/4

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.