Maths Brain Teaser

Can you solve this Maths Brain Teaser?

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The Answer is 3.
Triangle is 6 and Star value is 3

10 Cool Facts About Maths

1. The word “hundred” comes from the old Norse term, “hundrath”, which actually means 120 and not 100.

2. In a room of 23 people there’s a 50% chance that two people have the same birthday.

3. Most mathematical symbols weren’t invented until the 16th century. Before that, equations were written in words.

4. “Forty” is the only number that is spelt with letters arranged in alphabetical order.

5. Conversely, “one” is the only number that is spelt with letters arranged in descending order.

6. From 0 to 1000, the only number that has the letter “a” in it is “one thousand”.

7. ‘Four’ is the only number in the English language that is spelt with the same number of letters as the number itself.

8. Every odd number has an “e” in it.

9. The reason Americans call mathematics “math”, is because they argue that “mathematics” functions as a singular noun so ‘math’ should be singular too.

10. Markings on animal bones indicate that humans have been doing maths since around 30,000BC.

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Fun Maths

Puzzle Time

Kirigami Gets Mathematized

Kirigami, meaning “paper cutting,” is less famous than origami (“paper folding”), but both are finding their niches in industrial applications. Harvard researchers mastered the math of kirigami this year, illuminating new frontiers in manufacturing and materials sciences.

The Collatz Conjecture

Another of math’s biggest open problems jumped closer to a resolution this year. The improved results posted by prolific mathematician Terrence Tao rocked the math community. Even after Dr. Tao’s latest insights, the problem remains unfinished, and could still take years to solve.

          The Sum of Three Cubes

This one is some seriously ancient math. Diophantine equations are named after Diophantus of Alexandria, a 3rd century mathematician. Two particular Diophantine equations, including the one seen in this photo, evaded mathematicians until 2019. The breakthrough was enabled by the latest tech in shared computer power.

Progress on the Riemann Hypothesis 

The Riemann Hypothesis is generally seen as the biggest open problem in current mathematics. Standing since 1859, it relates to how prime numbers work, and connects to many other branches of math. Researchers this year proved something directly related to the Riemann hypothesis. Their proof is both insightful toward solving the big question, and fascinating in its own right.

5 Math Tricks That Will Blow Your Mind

Are you ready to give your mathematics skills a boost? These simple math tricks can help you perform calculations more quickly and easily. They also come in handy if you want to impress your teacher, parents, or friends.

01

of 10

Multiplying by 6

If you multiply 6 by an even number, the answer will end with the same digit. The number in the tens place will be half of the number in the ones place.

Example: 6 x 4 = 24

02

of 10

The Answer Is 2

1. Think of a number.
2. Multiply it by 3.
3. Add 6.
4. Divide this number by 3.
5. Subtract the number from Step 1 from the answer in Step 4.

The answer is 2.

03

of 10

Same Three Digit Number

1. Think of any three-digit number in which each of the digits is the same. Examples include 333, 666, 777, 999.
2. Add up the digits.
3. Divide the three digit number by the answer in Step 2.

The answer is 37.

04

of 10

Six Digits Become Three

1. Take any three-digit number and write it twice to make a six digit number. Examples include 371371 or 552552.
2. Divide the number by 7.
3. Divide it by 11.
4. Divide it by 13. (The order in which you do the division is unimportant.)

The answer is the three digit number

Examples: 371371 gives you 371 or 552552 gives you 552.

1. A related trick is to take any three-digit number.
2. Multiply it by 7, 11, and 13.

The result will be a six digit number that repeats the three-digit number.

Example: 456 becomes 456456

05

of 10

The 11 Rule

This is a quick way to multiply two-digit numbers by 11 in your head.

1. Separate the two digits in your mind.
2. Add the two digits together.
3. Place the number from Step 2 between the two digits. If the number from Step 2 is greater than 9, put the ones digit in the space and carry the tens digit.

Examples: 72 x 11 = 792

57 x 11 = 5 _ 7, but 5 + 7 = 12, so put 2 in the space and add the 1 to the 5 to get 627