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

During which month do people sleep the least?

What does below rebus means ?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Identify the hidden meaning behind this picture?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

what does this below rebus represent identXQQQQQME

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?