If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

Joseph buys three kinds of chocolates for 100 rupees. The first one is priced at 5 rupees, second one at 3 rupees and third one at 0.5 rupees.

If he bought 100 chocolates in total, how many pieces do you think he bought each chocolate?

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

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Find the hidden tiger in the given optical illusion ?