Logic puzzles, riddles, math puzzles and brainteasers - pzzls.com

Vandaag is het 16 October 2018

Sort - Most difficult on top
Page: << 12 13 14 15 16 >>

# The swamp - math puzzle

Difficulty:

Rating: 3.0/5.0

A rich earl has become the owner of a piece of land, which to his dissatisfaction turned out to be nothing more than a big swamp. The earl wants to get rid of the swamp. A salesman advises him to use his fast-growing plants which can cover the swamp very quickly. "This plant doubles every day, tomorrow you will have two, the day after tomorrow four, etc. In 80 days, your swamp will be completely covered." The earl reacts: "80 days? This takes far too much time. Then just give me eight of these plants."

Question 1: What did the earl think?
Question 2: And what do you think?

# Number magic - math puzzle

Difficulty:

Rating: 2.8/5.0

If you multiply me by 2, subtract 1, and read the reverse the result you'll find me. Which numbers can I be?

# Shaking sporters - math puzzle

Difficulty:

Rating: 3.0/5.0