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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!

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> Logic (1)	> Probability	> Shapes (2)	> General
> Numbers (2)	> Games	> Paradoxes	> Riddles
> Just Math	> Science	> Algorithms

Latest: Based upon a secret (in Sequences)

What are x,y,z in the following sequence : 4,16,18,19,10,x,y,z...?

(No Solution Yet, 0 Comments)

Submitted on 2019-04-23 by Ady TZIDON

Bonus: 3x3 sums (in Numbers) Rating: 3.00

Fill a 3 by 3 grid with the digits 1 to 9 using the following five rules:

1. The sum of the top row is twice the sum of the center row.

2. The sum of the left column is twice the sum of the center column.

3. The sum of the right column plus twice the sum of the bottom row is equal to the sum of the whole grid.

4. The sum of the bottom row plus twice the sum of the right column is not equal to the sum of the whole grid.

5. The top row is the only row with both odd and even numbers.

Show that there is only one solution.

(Solution Posted, 11 Comments)

Submitted on 2004-05-15 by Axorion

Numbers by Paint (in Logic)
Posted on 2019-04-23 by Charlie (No Solution Yet, 0 Comments)

Seven positive numbers (in Numbers)
Posted on 2019-04-22 by Danish Ahmed Khan (No Solution Yet, 0 Comments)

Constructed length ratio (in Geometry)
Posted on 2019-04-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)

Distinct figures of Circle and Triangle (in Geometry)
Posted on 2019-04-21 by Danish Ahmed Khan (No Solution Yet, 0 Comments)

Factor hints II (in Numbers)
Posted on 2019-04-20 by Danish Ahmed Khan (No Solution Yet, 1 Comments)

Know the functioning of the function? (in Just Math)
Posted on 2019-04-19 by Danish Ahmed Khan (No Solution Yet, 0 Comments)

A Jewish dilemma (in Word Problems)
Posted on 2019-04-19 by Ady TZIDON (No Solution Yet, 1 Comments)

Factor hints (in Numbers)
Posted on 2019-04-18 by Danish Ahmed Khan (No Solution Yet, 1 Comments)

Simple Adding (in Numbers)
Posted on 2019-04-18 by Danish Ahmed Khan (No Solution Yet, 1 Comments)

Looks like Cauchy (in Just Math)
Posted on 2019-04-17 by Danish Ahmed Khan (No Solution Yet, 3 Comments)

Breaking the Jewel code (in Numbers) Rating: 5.00
Posted on 2019-04-17 by Danish Ahmed Khan (No Solution Yet, 4 Comments)

Family ages (in Numbers)
Posted on 2019-04-16 by Danish Ahmed Khan (No Solution Yet, 4 Comments)

Tunneling through a mine car (in Just Math)
Posted on 2019-04-16 by Danish Ahmed Khan (No Solution Yet, 13 Comments)

2000 9s (in Numbers)
Posted on 2019-04-15 by Danish Ahmed Khan (No Solution Yet, 1 Comments)

Recently Posted Solutions:

Blobs' Borders 2 (in Shapes)
Submitted By Charlie. Solution posted on 2019-04-16 11:18:29

Butcher, Baker, Doctor, and Lawyer (in Liars and Knights)
Submitted By Charlie. Solution posted on 2019-04-12 14:13:39

Connect the Numbers (in Shapes)
Submitted By Charlie. Solution posted on 2019-04-12 14:11:41

Words 5x5 (in Word Problems)
Submitted By Charlie. Solution posted on 2019-04-01 15:12:51

Blobs' Borders (in Shapes)
Submitted By Charlie. Solution posted on 2019-03-27 11:26:30

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