It is possible, using a set of just 10 polyominoes, to construct any one of the 26 letters below. Can you find such a set? When constructing, polyominoes may be rotated and flipped, but may not overlap.

My prefix is unique My infix is forceful My suffix is frankly conclusive Yet, as a whole, I can be awakening What am I?

If you remove a letter from me, I'll become a Giant. Replace that and remove another letter, I'll enlighten you. Replace again and remove 2 letters, I'll be your buddy! Replace again and remove 3 letters, now I'll be alright! Lord created me. Who am I?

I have spent too much time on this question. I am convinced this cannot be done. Please prove me right (or wrong) and explain why. Below is a 5x5 grid. Digits 1 through 9 go in the 9 yellow boxes. Every digit must be used. Yellow boxes can only contain a single digit, nothing else.Obvious...

An evil bird snatched the ball but the people burst in laughter. An angry devil tried to kill the bird but the bird never died. Who is this crazy bird?

Inspired by Avi's Vowelburger™ Riddle Yesterday, Vowelburgers™ announced their first ever Penta-decker Vowelburger™. They have made some simplifications to their manufacturing process and have created a new burger for today. A Penta-decker Vowelburger™ means six consonant buns sandwiching five...

Melodically speaking, my worth's never none; Proportionally speaking, I'm a downer if under one; I'm wont to overlap; Or get up in a snap; But when I am used, I hope it's not for a ton. What am I?

What is the image below trying to say? $\hskip1in$

A Tyobrien riddle of the week With two, I flow With three, I’m one With four, I move With five, I’m none

The 27 junction boxes at the ends of electrical conduits must all have a green and red wire taps for the lighting fixtures. Only one wire fits the conduits for safety. The wires should be connected on the power source terminals at the ground floor level. But there are no extra conduits availabl...

Try interpret this image below. Why these numbers? Give a full explantaion as to why. Let's play b!

Which word is missing from the following sequence? Replace the question mark. Rembrandt ? Heinrich die

Since almost two days I am obsessed with this puzzle: Puzzle Picture It is a sliding-block-puzzle, also known as Klotski. The red block has to be moved to where the three red dots are. It says that it is solvable in 187 moves but it shows no solution. I have tried to solve it with an online progr...