How can you tell a raw egg from a hard-boiled egg?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

How far can you walk into the woods?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

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?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

A very interesting trivia question for all.

Why do men's shirts have their buttons on the right side and women's have buttons on the left-hand side?

I cannot talk, but I always reply when spoken to. What am I?