What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

Why do you find that most of the buildings are deprived of the 13th floor?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

What is next number in the pattern below:

131 517 192 123 ?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

I can write cow in 13 letters.

Can You?

Do You See It?

Find the missing letter in the last circle logically in the given below picture.

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?