Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

What is both possible and impossible at the same time?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

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

What is the word or phrase?