In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

Move four matchsticks to the below square to form three squares?

Do you know who was buried in John's tomb?

John and Jill are madly in love with each other. To remind Jill of his pure love, John wants to send her a ring by post but in their country where burglary is quite prominent, any package that is not locked comes under the risk of being stolen for the contents.

John and Jill possess many padlocks but neither one of them has the other key.

Can you find a way John can send the ring to Jill safely?

Our product and our sum always give the same answer. Who are we?

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

Replace the question mark with the number below given a simple math problem.

Using eight eights and addition only, can you make 1000?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

I always drive my customer away.

Who am I?