International Day of Mathematics 2024: 7 Maths Tricks for Quick Mental Calculation


international day of mathematics Celebrated annually on 14 March to commemorate the birthday of the famous mathematician piWas born on March 14, 1879. The purpose of the festival is to promote awareness and appreciation Mathematics Around the world, its importance in various aspects of life and its contribution to science, technology, engineering and many other fields were highlighted.
Events and activities organized on International Mathematics Day often include mathematical exhibitions, lectures, workshops, competitions and outreach programs that aim to connect people of all ages and backgrounds with the beauty and relevance of mathematics.
On this occasion, what better way to honor the discipline than exploring some clever mathematical tricks for quick mental calculations? From speeding up your arithmetic to impressing your friends with mathematical wizardry, mastering the math tips below can not only enhance your problem-solving skills but also make daily calculations easier.
Here are 7 clever tricks for mental math that will increase your calculation speed and make your life easier. From squaring numbers to multiplying by tricky numbers, get ready to sharpen your mental math skills with these techniques!
multiply by 11
To multiply any two-digit number by 11, simply add both digits together and place the result between the original digits. For example, to find 11 × 23, add 2 and 3 to get 5, then place 5 between 2 and 3 to get 253.
squaring numbers ending in 5
To square a number ending in 5, take the digit before 5, multiply it by its successor, and then add 25 to the result. For example, to find 65², take 6 and multiply it by its successor 7 to get 42, then add 25 and get 4225.
multiply by 5
To quickly multiply any number by 5, simply divide the number by 2 and then multiply by 10. For example, 37 × 5 can be calculated as (37 ÷ 2) × 10, which is equal to 185.
multiply by 9
To multiply any number by 9, simply multiply by 10 and then subtract the original number. For example, 37 × 9 can be calculated as (37 × 10) – 37, which is equal to 333.
find percentage
To find 10% of a number, simply move the decimal point one place to the left. To find 1% of a number, move the decimal point two places to the left. For example, 10% of 250 is 25, and 1% of 250 is 2.5.
finding squares near 100
To find the square of a number close to 100, subtract or add the difference between the number and 100 by 100, then add the square of that difference. For example, to find 96², subtract 4 from 100 (the difference between 96 and 100) to get 96, then add 4² (16) to get 9216.
divisibility by 3
If the sum of the digits of a number is divisible by 3, then the number itself is divisible by 3. For example, 573 is divisible by 3 because 5 + 7 + 3 = 15, which is divisible by 3.

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