Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

Why is the Hole below a Lock?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

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.

What does this rebus riddle means ?