Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

How do you go from 98 to 720 using just one letter?

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?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

There are forty elephants and they have forty-fore heads. How can this be possible?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

If eleven plus two equals one, what does nine plus five equal?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?