Can you find out which number multiplied by itself will give the output as 12345678987654321?

Which English verb becomes past tense just by rearranging the letters?

Why is the Hole below a Lock?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

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?

Find the missing number in the sequence below:

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

I add 5 to 9 and get 2. The answer is correct, so what am I?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

Who has married many women but was never married?