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> General
> Numbers (3)> Games> Paradoxes> Riddles
> Just Math> Science> Algorithms
Difficulty: 2 of 5 Latest: Why is it D2? (in Numbers)
Find the smallest positive integer fitting the following description:

i. All its digits, except two, are sixes.
ii. It is prime.

Why is this puzzle D2?

(No Solution Yet, 4 Comments) Submitted on 2017-03-27 by Ady TZIDON   
Difficulty: 3 of 5 Bonus: Time And Distance Problem (II) (in General) Rating: 3.50
P and Q are two stations 34 kilometres apart. Rick starts from P precisely at 12 noon and walks toward Q at the constant rate of 4 kilometres per hour. After journeying on for 3/2 hours he takes a rest for another 3/2 hours and then resumes his journey at the constant rate of 5 kilometres per hour.

Saul leaves Q exactly 2 hours after Rick leaves P and travels at a constant rate of 5 kilometres per hour for 2 hours. He (Saul) then takes rest for one hour before resuming his journey (towards P) at the constant rate of 4 kilometres per hour.

When and where will Rick and Saul meet? What was the distance between them at 3:00 PM? Determine when Rick and Saul were 8 kilometres apart for the first time.

Note: Rick and Saul keep on walking after they meet until they reach their respective destinations.

(Solution Posted, 2 Comments) Submitted on 2006-12-29 by K Sengupta   
Difficulty: 3 of 5Power partition procedure (in Numbers)
Posted on 2017-03-26 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 51 is one of them (in Numbers)
Posted on 2017-03-25 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5True for nine and up (in Numbers)
Posted on 2017-03-24 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5POPANASIS (in Word Problems)
Posted on 2017-03-23 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Up and up (in Numbers) Rating: 5.00
Posted on 2017-03-22 by Ady TZIDON (No Solution Yet, 2 Comments)
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 (Solution Posted, 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)

Recently Posted Solutions:
Difficulty: 4 of 5Primes and factors (in Numbers)
Submitted By Ady TZIDON. Solution posted on 2017-03-27 07:52:13
Difficulty: 3 of 5Integer triplets (in Just Math)
Submitted By Ady TZIDON. Solution posted on 2017-03-27 01:51:50
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
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 (7)
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