A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

What is the word or phrase below?
R | E | A | D

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

Can you find the company name in the pictogram below?

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?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

If two's company, and three's a crowd, then whats four and five ?

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