## Ship Carpenter's Problem of Plugging a Square Hole

A ship carpenter has a problem of plugging a 12in square hole by cutting a single 9in x 16in wood block into two pieces to join the two. Is it possible?

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Submitted by Atanu Chaudhuri on Thu, 16/12/2021 - 18:37

Submitted by Atanu Chaudhuri on Sun, 05/12/2021 - 20:58

In ten barrel face number riddle, rearrange ten barrels in a pyramid so that sum of face numbers of four barrels on each outer side is equal and minimum.

Submitted by Atanu Chaudhuri on Sun, 28/11/2021 - 21:21

In the puzzle figure, move 3 matches to make 7 squares. You have 5 minutes to solve the puzzle. And know how to solve easily from the solution.

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

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.

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 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 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.

Submitted by Atanu Chaudhuri on Wed, 03/11/2021 - 20:32

Riddle of four coins touching: place four circular coins on a table touching each other such a way that if you place a 5th coin it'll touch all others.