## Connect the Nine Dots Riddle: Step by Step Solution

Join the nine dots in a 3-by-3 grid by 4 straight lines without raising the pencil. Solve in 30 mins. Learn how to solve the tough puzzle from the solution.

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For each one, first the puzzle is posed for you to solve within a recommended time. A detailed systematic solution then follows.

Matchstick puzzles, riddles, math puzzles, logic puzzles, river crossing puzzles, ball weighing puzzles are some of the categories.

The **full list of all brain teasers with solutions** is available in the link,

**Challenging brain teasers with solutions: Long list.**

This will always be the **most up-to-date list** with the brain teasers **classified into categories** that can be browsed separately.

Submitted by Atanu Chaudhuri on Sat, 27/11/2021 - 20:00

Submitted by Atanu Chaudhuri on Sat, 27/11/2021 - 00:54

Add 9 matches to make 8 nodes in the puzzle figure of a triangle of 3 nodes made up of 3 matchsticks. Time to solve: 5 minutes. Try applying reason.

Submitted by Atanu Chaudhuri on Thu, 25/11/2021 - 23:44

Can you find the three-digit code to open the number lock? You have five clues each based on a code combination. Time to solve the riddle, 10 minutes.

Submitted by Atanu Chaudhuri on Thu, 25/11/2021 - 20:30

In matchstick figure, remove 3 matches and leave 3 triangles. You have 10 minutes to solve the puzzle. Try and then learn how to solve from solution.

Submitted by Atanu Chaudhuri on Thu, 25/11/2021 - 00:53

In puzzle figure, move 2 matches to make 3 triangles with no match unattached to any triangle. Solve in 5 minutes. Learn how to solve easily from solution.

Submitted by Atanu Chaudhuri on Wed, 24/11/2021 - 20:26

Move 2 to form 11 squares is a tricky matchstick puzzle to solve in 5 minutes. Give it a try and then learn problem solving in puzzles from the solution.

Submitted by Atanu Chaudhuri on Mon, 22/11/2021 - 19:26

Change money math puzzle: Find three money amounts all made up of same three digits and sum of two amounts equal to the third amount. Time to solve 15 mins.

Submitted by Atanu Chaudhuri on Sun, 21/11/2021 - 23:12

Solve matchstick puzzle move 4 to make 10 squares in 5 mins. Each matchstick must be attached to a square in the solution figure. Think systematically.

Submitted by Atanu Chaudhuri on Sun, 21/11/2021 - 00:01

12 guests in a dinner party, 4 couples and 4 persons without spouses, shake hands with each other except their spouses. How many handshakes were there?

Submitted by Atanu Chaudhuri on Sat, 20/11/2021 - 15:38

Knight and Calculator Keypad Riddle: Find valid 10 digit numbers by the knight moves on calculator keypad. Visit every digit once only. Solve in 15 mins.