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?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

What's the only room from which no one can enter or leave

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?

Solve the mathematical equation in the picture below.

What does this Rebus Picture means ?

Decode below rebus
D
N
A
T
S , D

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?