You're in a sealed room with no doors, vents, or windows. All that is in the room is a chainsaw with a full tank and a table. How do you get out?

Can you place these numbers into 5 rows of 4 such that each row totals 20? 1, 2, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 6, 6, 7, 8, 8, 8

I'm on patrol I'm on a roll! I want to clean Could you please lean? What could I be? Your answer should be one or two words, depending on how you spell this well-used phrase. Make sure you provide an explanation.

There is an island with $N$ inhabitants (for example $A_1, A_2, \dots, A_N$), each of them is either a knight, a knave, or a spy. As usual: knights will always tell the truth upon answering a question, knaves will always lie, and spies can do both (however they always alternate the truth value ...

Once I was flirting with the receptionist at the gym. She marveled at my international business travel and I joked I was Bond, James Bond. She laughed... and instead of a locker key she handed me a key to the loo! What gives?

I've gotten this riddle and have been struggling with solving it: Suppose you have 20 stones which have different weights [0 ... n] . You have no way of measuring the weight of any stone individually, instead you can only measure them by putting 10 on each side of a balance. After doing this you...

After snowmobiles' usage had been wide spreaded, the one of THEM was mentioned to extinct. There are about 400 of THEM in the world. Who are THEY?

I received this picture, and the sender told me that it means something?

I design picture puzzles and post them under an Instagram account @ruthlesspuzzle. What is this picture? [nohints]

A man withdrew half the money that was in his bank account to buy a second-hand car, then sold the car two weeks later, receiving only three-quarters of the price he had paid for it. When he paid the money back into the bank account he found his bank balance was £600 less than it had been origina...

Here's a quick one that should be easy. You've heard me before. A Cinematic Icon Perfect audio. What am I?

I made a small number crossword for my mathletes club that I thought I'd share. It's not too hard, I think it's just right for a coffee break. Have fun! (Edit: No answer has a leading zero)