# 10 Math Tricks that will blow Your Mind

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

## 1. Multiplying by 6

If you multiply 6 by a number, the answer will end with the same digit. The number in place of ten will be half of the number in place of one.

Example: 6 x 4 = 24.

## 2. Answer is 2 (Math Tricks)

• Multiply this by 3.
• Divide this number by 3.
• Reduce the number from step 1 to the answer in step 4.

Also Read: 10 best quiz games for windows

## 3. Same three-digit number (Math Tricks)

• Think of any three-digit number in which each digit is the same. Examples include 333, 666, 777 and 999.
• In step 2, divide the three-digit number by the answer.

## 4. Six digits become three

• Take any three-digit number and write it twice to make a six-digit number. Examples include 371371 or 552552.
• Divide the number by 7.
• Divide it by 11.
• Divide it by 13.

The order in which you divide is insignificant!

Answer is a three digit number.

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

• The corresponding trick is to take any three-digit number.
• Multiply this by 7, 11 and 13.

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

Example: 456 becomes 456456.

Also Read: 10 best quiz games for windows

## 5. 11 rules (Math Tricks)

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

• Separate the two digits in your brain.
• Place the number from step 2 between the two digits. If the number from step 2 is greater than 9, place one’s digit in space and move the digit of ten.

Example: 72 x 11 = 792.

5 x 11 = 5 _ , but 5 +, = 12, so put 2 in the space and add 1 to 5 to get 42

## 6. Remembering pie

To remember the first seven digits of the pie, count the number of letters in each word of the sentence:

“How I wished I could count the pie.”

This becomes 3.141592.

## 7. Includes digits 1, 2, 4, 5, 7, 8 (Math Tricks)

• Select a number from 1 to 6.
• Multiply the number by 9.
• Multiply this by 111.
• Multiply this by 1001.
• Divide the answer by 7.

The number will contain 1, 2, 4, 5, 7 and 8 digits.

To easily multiply two double digit numbers, use their distance from 100 to make the math easier:

• Subtract each number from 100.
• 100 minus this number is the first part of the answer.
• Multiply the digits by step 1 to get the second part of the answer.

Also Read: 10 best quiz games for windows

## 9. Super simple divisibility rule (Math Tricks)

You’ve got 210 pieces of pizza and you want to know if you can divide them evenly in your group. Instead of whipping the calculator, use these simple shortcuts to do the math in your head:

• The last digit if divisible by 2 is a multiple of 2 (210).
• Divisible by 3 if the sum of digits is divisible by 3 (522) because the digits add up to 9, which is divisible by 3).
• Divisible by 4 if the last two digits are divisible by 4 (divisible by 2540 by 40) because 4 is divisible by 4.
• Divisible by 5 if the last digit is 0 or 5 (9905).
• Divisible by 6 if it passes the rules of both 2 and 3 (408).
• Divisible by 9 if the sum of digits is divisible by 9 (6390 + 9 + 0 = 18 since 6, which is divisible by 9).
• Divisible by 10 if the number ends in 0 (8910).
• Divisible by 12 if the rules of divisibility by 3 and 4 apply.

Example: 210 slices of pizza can be evenly distributed in groups of 2, 3, 6, 10.

## 10. Finger multiplication table

Everyone knows that you can count on your fingers. Did you realize that you can use them for multiplication? A simple way to do a “9” multiplication table is to place both your hands in front of the fingers and thumb. To multiply 9 by a number, bend that number finger, counting from the left side.

Example: To multiply 9 by 5, bend the fifth finger from the left side. Count the fingers on either side of the “fold” to get an answer. In this case, the answer is 45.

To multiply 9 times 6, bend the sixth finger down, answer 54.