Here is a mathematical expression that also secretly tells a movie name. What movie is that?

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

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

What is the Surname of Barbie Doll?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Can you guess the name of the month by looking the below rebus ?

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?

Can you place six X (crosses) in below board without making three in a row in any way ?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Prove that the below maths equation is true.

8 + 8 = 91