Most Important Math Tricks and Tips

1. The Answer Is 2

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

2. Same Three-Digit Number

Think of any three-digit number in which each of the digits is the same. Examples include 333, 666, 777, and 999. Add up the digits. Divide the three-digit number by the answer in Step 2. The answer is 37.

3. The 11 Rule

The 11 rule is one of those magic tricks and methods that can be used to quickly multiply two-digit numbers by 11 in your head. Separate the two digits in your mind. Add the two digits together. Place the number from Step 2 between the two digits. If the number from Step 2 is greater than 9, put the one's digit in the space and carry the ten's digit.

4. Multiply by 2 and 4

\When a number is multiplied by 2 or 4, then the last digit of the resulting value will be an even number always. Examples: – 19 x 2 = 38 – 19 x 4 = 76

5. Multiplication by 10

When a number is multiplied by 10, then the resulting value ends with 0 always. Examples: – 5 x 10 = 50 – 10 x 10 = 100 – 11 x 10 = 110 – 17 x 10 = 170 – 211 x 10 = 2110

6. Tricks to Memorise Table of 9

It is easy to remember the table of 9. Just we need to focus on the pattern. 09, 18, 27, 36, 45, 54, 63, 72, 81, 90 We can see the numbers at the ten’s place are increasing by 1, and the numbers at the unit place are decreasing by 1.

7. Memorizing Pi

This is probably the most fun tricks in maths -to remember the first seven digits of pi, count the number of letters in each word of the sentence: "How I wish I could calculate pi." This becomes 3.141592.

8. Multiplied By 15

– Consider the multiplication of two numbers say 56 and 15 – Now add zero at the end of the first number, it becomes 560. – Divide that number by 2; we get 560/2 = 280 – Add the resultant number with 560, so 560 + 280 = 840. – So the answer for 56 and 15 is 840.