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.

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

How can you leave a room with two legs and return with six legs?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Can you replace the question mark with the correct number?