This one’s different. No theme. No story. Just puzzles.

Euler Blocks is a pack of ten computational challenges inspired by Project Euler — the legendary set of math problems that programmers have been grinding since 2001. These puzzles reward clever thinking and efficient solutions.

The Challenges

Power Up — Compute 2 to the 10th. Three blocks. Warm-up.

Order of Operations — Compute (7 + 3) x (12 - 4). The parentheses matter. Eight blocks if you build it right.

Mirror Mirror — Is “racecar” a palindrome? Reverse it and compare. Logic meets text manipulation.

Text Flip — Uppercase “hello world” then reverse it. Operation order changes everything. “DLROW OLLEH” is the target.

Gauss’s Shortcut — Find the sum of all numbers from 1 to 100. You could use a loop with 23 blocks. Or you could use the formula Gauss figured out at age 8 and do it in 8. Your call.

How Long Is That? — Join “Fizz” and “Buzz” together, then print the length. Five blocks. String operations chained.

Secret Swap — Take “attack at dawn” and replace every “a” with “@.” Five blocks and a substitution cipher.

Logic Gate — Is 42 greater than 10 AND less than 100? Compound boolean expressions with real numbers.

Towers of Power — What is 2^(2^(2^2))? Three nested power blocks. The answer is 65,536. Think inside-out.

The Counter — Use a repeat loop to count from 1 to 5, printing each number. Sounds easy until you realize you need a manual loop counter with global variables. Thirteen blocks at par.

Why This Pack Exists

The themed packs teach concepts through stories. Euler Blocks strips all of that away and asks: can you solve the puzzle?

These challenges have tight par scores. Matching par means you found the efficient solution. Beating par means you found something we didn’t think of. Every block counts.

Some of these have multiple valid approaches. Gauss’s Shortcut can be solved with a formula or a loop. The formula is elegant. The loop is brute force. Both work. Only one hits par.

Ten challenges. Zero fluff. Pure computation.