In the spirit of the What is a Word™/Phrase™ series started by JLee, a special brand of Phrase™ and Word™ puzzles. If a word conforms to a special rule, I call it a Rainbow Word™. The ones given here are particularly strong examples, to help you out, and while the order of Rainbow Words™ doesn't...

Write down all integers from 1 to 1000. Beginning with 1 cross out every second number. Now repeat the process - cross out every second number from those that remain. Keep repeating the process until just one number remains. What is this last remaining number?

Our polarity was mentioned but never revealed Coulombs we made, but our fate was sealed Repelling the dark, we refused to yield They had a battery: We died in the field Who are we and how many? (Please explain each line) Hints If we had been switched on, we might have better seen our fate. But...

This puzzle is dedicated to the great Diego Maradona. Maradona has the ball and is going for an amazing run. He must get around all his opponents and score the ball into the goals (gray cells). At each turn he can do the following: Move into one of 8 neighboring empty cells. Move into the neighb...

6 5 4 3 13 12 11 10 20 19 18 17 27 26 25 24 Arrange the following numbers in a way such that the product of all rows, columns and the diagonals add up to the same number.

Pills and pills, stuck between the hills. I may be right but must not be wrong. I may be cute but will not be ferocious. I am from Greece. Oh! So precious. Short pistols, long snipers, From earth to heaven I form borders, The optimists would be seperated, The pessimists would call me an eye. ...

I could not solve a question from an online IQ test: The options were: 10, -5, 32 and 18 The only pattern that I managed to find was that the numbers went in an odd-even sequence(that means, odd-even-odd-even or even-odd-even-odd), so the missing number would be odd. The only odd number is -5, ...

Normally a nuke is delivered by missile or plane But not this time, as it was on a train Like a mirage, a mushroom in the sky Overpassing the clouds, so high I begin to experience vertigo Witnessing this huge inferno Only to be reduced to dust

In Most Captures Chess puzzle, you will need to provide a legal game where it is Blacks to play and where they have the most different ways to capture a White piece. For instance, the next game allows two ways for Blacks to capture a White piece. 1. e4 d5 2. c4 How many ways will you reach?

You wake up in a lab room, with papers, test tubes, computers, not understanding how you got there. A scientist is across the room. "Welcome to my secret lab", he says. "To get out, you must pass the Atom Riddles. " "I've been puzzled too much! Can you make it quick? And I don't like science that...

My prefix lets you drop without delay. My infix forms what you need to say. My suffix gives equality in every way. My whole gets stepped on everyday.

I asked my cousin where he's studying. He didn't answer directly, but said some random sentences. You love taking photographs, then you're much nearer. Do first, think later! You're looking for an animal and a vehicle. Could you find where my cousin is studying?

Can you collect all the gifts? The rules: Start from the star At each intersection are arrows. You can only move through the intersection in accordance with the direction of the arrow. (e.g If you hit an intersection with an arrow pointing down and to the left, when you hit that intersection you...

This is one of the random iq test puzzles available on the internet. I can not find a clue to this at all and this is sort of bugging me for some time now. It could be some kind of paper folding or just rotations; I am not sure though. Note : Feel free to edit the title.

The goal is to come up with an answer with the help of the image below. Together with the title, they should lead to the correct answer.

What's next on this list? JBNRS, HF, GM, JPD, VL, AELMP, MS, WB, CB, GS, EC, SV, PD, PEJP, ?, …

Background definition: XOR on numbers Given two non-negative integers $x$ and $y$, let $x\oplus y$ denote the bitwise exclusive or (XOR) of the numbers $x$ and $y$. This is the result of writing $x$ and $y$ in binary notation, then XORing corresponding bits (also known as "addition without carry"...