# 7 Hardest Math Logic Puzzles With Solutions

January 08, 2017
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**Hardest Math Logic Puzzles With Solutions | Matjokes.net**

If you like math and you love math logic puzzles then you’ve come to the right place as we have the best math logic puzzles.

Here is your chance to pit your brain against some of the world’s hardest math logic puzzles ever created.

Most of the math puzzles are repeated in a number of webpages--with or without various, which makes it difficult to credit a particular Internet source. Instead, we thank all Internet collectors of math logic puzzles.

So here’s our favorite math logic puzzles.

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**Hardest Math Logic Puzzles With Solutions**

Hardest Math Logic Puzzles With Solutions |

**Math Puzzles 1:**

Bob brings home 100 lbs of potatoes, which (being purely mathematical potatoes) consist of 99 percent water. He then leaves them outside overnight so that they consist of 98 percent water. What is their new weight?

**Answer:**

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**Math Puzzles 2:**

A census worker asked a mother for the ages (years, not months) of her three children. The mother replied that the product of their ages is 36, and the sum of their ages is the same as the address (house number) to the north. After looking at that adress, the census worker returned and said to the mother:"I need more information." The mother said: " The oldest is sleeping upstairs." What are the agaes of the three children? What is the address (house number) next door to the north?

**Answer:**

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**Math Puzzles 3:**

How to solve the width of the river without crossing it? if you only have a big protractor and a meter stick?

**Answer:**

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**Math Puzzles 4:**

Three ladies went to a tv shop and bought a tv for £30 from a salesman. each one payed £10 each. boss says give £5 back. salesman puts £2 in his pocket and give £1 each back to the ladies. women have payed £9 each now, £9 £18 £27. salesman have put £2 in his pocket £29. Where is the other £1?

**Answer:**

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**Math Puzzles 5:**

You have 20 Blue balls and 10 Red balls in a bag. You put your hand in the bag and take off two at a time. If they’re of the same color, you add a Blue ball to the bag. If they’re of different colors, you add a Red ball to the bag. What will be the color of the last ball left in the bag?

**Answer:**

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**Math Puzzles 6:**

You are on your way to visit your Grandma, who lives at the end of the valley. It’s her anniversary, and you want to give her the cakes you’ve made. Between your house and her house, you have to cross 5 bridges, and as it goes in the land of make believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake.

How many cakes do you have to leave home with to make sure that you arrive at Grandma’s with exactly 2 cakes?

**Answer:**

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**Math Puzzles 7:**

Two trains are 2 miles apart and are traveling towards each other on the same track, each train going 30 mph. A fly going 60 mph starts at the nose of one train, flies toward the other train, and upon reaching the second train immediately turns around and flies back towards the first train. The fly buzzes back and forth until all three collide. How far did the fly fly?

**Answer:**

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