How can you take 2 from 5 and leave 4?

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

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Why blonde cannot dial 911?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

What question can you never answer yes to?

what does the below rebus means?

Count the squares in the matchstick puzzle below?

I cannot talk, but I always reply when spoken to. What am I?