All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info
Home
Welcome to perplexus.info, flooble's perplexing puzzle portal. Here, we collect all sorts of puzzles, from simple logic questions and word tricks to in-depth math problems like probability and geometry. Click around and see if your brain is up to the task! If you're new here, make sure you sign up so that you can leave comments and submit your own problems!
> Logic> Probability> Shapes (1)> General
> Numbers (2)> Games> Paradoxes> Riddles
> Just Math> Science> Algorithms
Difficulty: 3 of 5 Latest: Up and up (in Numbers)
Find the largest number whose square
has strictly increasing digits.
(No Solution Yet, 2 Comments) Submitted on 2017-03-22 by Ady TZIDON   
Difficulty: 4 of 5 Bonus: Electric car (in General) Rating: 4.38
You have an electric car that you want to use to transport some batteries 1,000 miles. You have 3,000 batteries, but your car can only carry 1,000 of them at once. In addition, for each mile that it travels, the car will need to use up one battery in order to power itself.

How many unspent batteries will you be able to transfer to your destination?

(Solution Posted, 16 Comments) Submitted on 2002-08-29 by levik   
Difficulty: 3 of 5 The sum of 2016 terms (in Sequences)
Posted on 2017-03-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5 Elongated Pentagonal Orthocupola's vertices (in Shapes)
Posted on 2017-03-20 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Leave no stone unturned (in Logic) Rating: 4.00
Posted on 2017-03-19 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5A rare palindrome (in Numbers)
Posted on 2017-03-18 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Primes and factors (in Numbers)
Posted on 2017-03-17 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Same side story (in Probability)
Posted on 2017-03-16 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5It's obvious, but needs proof (in Just Math)
Posted on 2017-03-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Equality? Yes, but not exactly... (in Numbers)
Posted on 2017-03-14 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Integers and their sums of digits (in Just Math)
Posted on 2017-03-13 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A Square Slab and a Cube (in Shapes)
Posted on 2017-03-12 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Three heights in a triangle (in Geometry)
Posted on 2017-03-11 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Staircases in a Cube (in Shapes)
Posted on 2017-03-10 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5 1 progression, 2 sums, 3 numbers (in Just Math)
Posted on 2017-03-09 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5An easy whodunit (in Logic) Rating: 3.50
Posted on 2017-03-08 by Ady TZIDON (Solution Posted, 7 Comments)

Recently Posted Solutions:
Difficulty: 3 of 5A frugal sequence (in Numbers)
Submitted By Ady TZIDON. Solution posted on 2017-03-18 10:48:10
Difficulty: 3 of 5Prime with distinct digits (in Numbers)
Submitted By Ady TZIDON. Solution posted on 2017-03-18 10:30:11
Difficulty: 3 of 5Icy winter shifting (in Just Math)
Submitted By Ady TZIDON. Solution posted on 2017-03-18 10:17:12
Difficulty: 3 of 5The toll of two cities (in Geometry)
Submitted By Ady TZIDON. Solution posted on 2017-03-18 06:37:13
Difficulty: 2 of 5An easy whodunit (in Logic)
Submitted By Ady TZIDON. Solution posted on 2017-03-13 22:35:24
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (2)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2017 by Animus Pactum Consulting. All rights reserved. Privacy Information