Can you count the number of quadrilaterals in the picture below?

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?

What kind of band never plays music?

What is harder to catch the faster you run?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

What's a single-digit number with no value?

Identify the 10 differences between the two given pictures.

It is always ahead of me yet I can never see it. What is it?

It belongs to you, but other people use it more than you do. What is it?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?