**Top 20 Mathematical Puzzles**

**Mathematical Puzzles 1 : Brain Twister Puzzle**

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2+3=8,

3+7=27,

4+5=32,

5+8=60,

6+7=72,

7+8=??

Solve it?

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**Mathematical Puzzles 2 : Hardest Math Riddle**

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Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

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**Mathematical Puzzles 3 : February Maths Puzzle**

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Using eight eights and addition only, can you make 1000?

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**Mathematical Puzzles 4 : Secret Code puzzle**

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A man wanted to get into his work building, but he had forgotten his code. However, he did remember five clues. These are what those clues were:

The fifth number plus the third number equals fourteen.

The fourth number is one more than the second number.

The first number is one less than twice the second number.

The second number plus the third number equals ten.

The sum of all five numbers is 30.

What were the five numbers and in what order?

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**Mathematical Puzzles 5 : Gold Bar Fewest Cut Puzzle**

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A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

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**Mathematical Puzzles 6 : Weighing Balance Puzzle**

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You can place weights on both side of weighing balance and you need to measure all weights between 1 and 1000. For example if you have weights 1 and 3,now you can measure 1,3 and 4 like earlier case, and also you can measure 2,by placing 3 on one side and 1 on the side which contain the substance to be weighed. So question again is how many minimum weights and of what denominations you need to measure all weights from 1kg to 1000kg.

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**Mathematical Puzzles 7 : Hard Maths Puzzle**

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A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

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**Mathematical Puzzles 8 : November Maths Puzzle**

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The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.

How far does the dog travel in 1 hour?

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**Mathematical Puzzles 9 : Maths Joke Puzzle**

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If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

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**Mathematical Puzzles 10 : Interesting Number puzzle**

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A number with an interesting property:

When I divide it by 2, the remainder is 1.

When I divide it by 3, the remainder is 2.

When I divide it by 4, the remainder is 3.

When I divide it by 5, the remainder is 4.

When I divide it by 6, the remainder is 5.

When I divide it by 7, the remainder is 6.

When I divide it by 8, the remainder is 7.

When I divide it by 9, the remainder is 8.

When I divide it by 10, the remainder is 9.

It's not a small number, but it's not really big, either.

When I looked for a smaller number with this property I couldn't find one.

Can you find it?

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**Mathematical Puzzles 11 : CAT Exam Puzzle**

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5+3+2 = 151022

9+2+4 = 183652

8+6+3 = 482466

5+4+5 = 202541

THEN ;

7+2+5 =

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**Mathematical Puzzles 12 : Simple Simple Google Interview Puzzle**

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The puzzle is if the shopkeeper can only place the weights in one side of the common balance. For example if shopkeeper has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names the weights you will need to measure all weights from 1 to 1000. This is a fairly simple problem and very easy to prove also. Answer for this puzzle is given below.

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**Mathematical Puzzles 13 : November Puzzle**

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In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.

ABCABA

BBDCAA

ABEABB

ABDBAA

------- +

AAFGBDH

What does the complete addition look like in digits?

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**Mathematical Puzzles 14 : Maths Puzzle**

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How can I get the answer 24 by only using the numbers 8,8,3,3.

You can use the main signs add, subtract multiply and divide.

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**Mathematical Puzzles 15 : Math Puzzle**

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You have 1023 apples and 10 bags. You have to distribute these lemons in these 10 bags in any way you choose. But when I ask for a certain number of lemons you have to give them in terms of bags without transferring the lemons from other bags. How do you distribute the lemons?

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**Mathematical Puzzles 16 : Sam Loyd Maths Puzzle**

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Charley Smalleash treats his best girl to a trolley ride, but on account of his limited resources they plan to walk back, so, if the car goes at the rate of nine miles an hour and they can walk at the rate of three miles an hour, how far could they ride if they must be back in eight hours?

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**Mathematical Puzzles 17 : Maths Quiz**

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Fred can eat 27 chocolates in a hour, Alice can eat 2 chocolates in 10 minutes, and Kelly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a large box of 120 chocolates whilst watching a movie?

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**Mathematical Puzzles 18 : Smart Math Problem**

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As they say, beggars can't be choosers, in fact begger take what they can get. A begger on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the begger finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

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**Mathematical Puzzles 19 : Classic Hens Eggs Puzzle**

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A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

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**Mathematical Puzzles 20 : Identify The 4 Numbers**

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Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.

One number is odd.

The highest number minus the lowest number is 7.

If you subtract the middle two numbers, it equals two.

There are no duplicate numbers.

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**Last Updated:2012-04-28**

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