Algebra Puzzle – Challenge 37
Algebra Puzzle – Challenge 37 is a multiple-choice math challenge from Effortless Math. Read the problem, choose from the answer options below, then open the solution to see the full step-by-step working and check your reasoning against it. This is a great critical thinking challenge for those who enjoy teasing their brain and testing their […]
Algebra Puzzle – Challenge 34
This challenge is a work-rate problem: eight workers build a house in twenty days, and you are asked how many workers finish it in four. Because workers and days vary inversely, the total worker-days stays fixed at 160. A full worked solution follows the question.