Skip to main content
Puzzling
Albert.Lang's user avatar
Albert.Lang's user avatar
Albert.Lang's user avatar
Albert.Lang
  • Member for 3 years, 11 months
  • Last seen this week
Profile Activity

84 Answers

Score Activity Newest
42 votes

Can you tile a 25 x 25 square with a mixture of 2 x 2 squares and 3 x 3 squares?

34 votes
Accepted

Largest number possible with +, -, ÷

25 votes
Accepted

Maximizing the common value of both sides of an equation

22 votes
Accepted

General attacking chessboard squares

22 votes
Accepted

Maximum number of pieces on a board

18 votes

Fitting 10 pieces of pizza in a box

17 votes

Make numbers 1 - 30 using the digits 2, 0, 2, 4

16 votes

Prove that sin(x) ≥ x/2, but without calculus!

15 votes
Accepted

Largest number using 1, 2, 3, 4

15 votes

Use all eight of the given polygons to tile a parallelogram

14 votes

Find the perimeter (seemingly unsolvable problem)

13 votes
Accepted

Seven robot ants that stay forever on a rod

13 votes
Accepted

1+3 Towers of Hanoi

13 votes

Rock climbing at the Tokyo Olympics

13 votes

849, 352, 768, 493, 527 - Unusual number sequence problem

13 votes
Accepted

Logical puzzle from a math homework for Russian fifth-year school students

12 votes

77-digit number divisible by 7 with seven 7s

12 votes
Accepted

One-sided chess: Self stalemate revisted

11 votes

Dividing a chocolate frosting cake

11 votes

New record for minimally clued 5x5 Hidato

11 votes

Arithmetic-progression-free sequences

11 votes
Accepted

Maximizing the common value of both sides of an equation (part 2)

10 votes

How did White lose all their pieces?

10 votes

Can White still castle?

10 votes

A balanced banquet

10 votes
Accepted

(Almost) all hands on check

10 votes
Accepted

Lap Theory Optimal Betting Game

10 votes
Accepted

A nice robot-control puzzle

9 votes

12 piece cube packing puzzle

9 votes
Accepted

An infinite series of origami puzzles

1
2 3