Hidden Cat
Can you spot the cat in this city?
Found online, don’t know the source.
Archives: Community Posts
Puzzle Prime is tirelessly looking all around the internet to find the very best puzzles and bring them all to puzzleprime.com.
Lighthouse on the Coast
A lighthouse is x miles away from the coast. Its beam makes 1 revolution per minute. How fast is the beam moving along the beach, when the point on the beach it lightens up is y miles away from the point on the beach closest to the lighthouse?
Get Rich or Get Broke
You start with $20 and keep betting $1. What is the probability that you will get broke before you win $50? What is the expected number of bets until one of these 2 events happens?
Isosceles Triangle 80-80-20
That’s my favorite geometric problem from high-school days…
You are given an isosceles triangle ABC, ∠CAB = ∠ABC = 80°. Point D belongs to the side BC, so that AB = CD. Find the measure of angle ∠DAB.
Find the Differences
Here is a fun puzzle, created by Hot Spring World. There are 8 differences between the pictures below. Can you find them all?
