What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Can you find out the remainder when 3^300 is divided by 5?

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

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

Which is Odd One Out and why?

4377

3954

9862

8454

9831

What does below rebus means ?

What is both possible and impossible at the same time?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

What can jump higher than a building?