It is no news that many students hate Mathematics. We don’t blame them; Maths can actually be very difficult. But what if we told you that there are some simple tricks that will help you solve those mathematical problems easily and maybe even make you fall in love with the subject? Certainly! Now read on below to see what we are telling you about-
1.How to Calculate Percentages faster
The quickest way to calculate percentages is to multiply numbers first and worry about the two decimal places later. Remember that a “percent” means a fraction out of 100, which means move the decimal two digits to the left. Take for example, to find out the 20 percent of 70, 20 x 70 would equals 1400. Therefore, your answer is 14.
2.Easy Division Rule
So you are trying to quickly decide if 408 pieces of oranges can be equally shared by 12 of your friends. This next tricks will help you accomplish just that. Note however that these tricks work for all numbers without fractions and decimals.
- Your number can be divisible by 2 if its last digit is divisible by 2.
- Your number can be divisible by 3 if the sum of the digits of the number are divisible by 3
- Your number can be divisible by 4 if the last two digits of the number are divisible by 4
- Your number can be divisible by 5 if the last digit is 0 or 5
- Your number can be divisible by 6 if the rules of divisibility for 2 and 3 work for that number (e.g 408).
- Your number can be divisible by 9 if the sum of digits of the number are divisible by 9
- Your number can be divisible by 12 if the rules of divisibility for 3 and 4 work for that number (e.g. 408).
3.Faster Square Roots?
Everybody knows that the square root of 4 is 2, but what about the square root of 85?
Give a quick estimate by:
- Finding the nearest square. In this case, the square root of 81 is 9.
- Determining the next nearest square. In this case, the square root of 100 is 10.
- The square root of 85 is a value between 9 and 10. Since 85 is closer to 81, the actual value must be 9 point something.
Now thank us later!
