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From Zero to a Hero!

Easy math tricks!

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From Zero to a Hero!

Mathematics are usually tough for many students.  Once these strategies are mastered, you will love mathematics. It’s because of the lack of practice and of course the fear for the subject. There are lot of tricks that can be done to make math easy and make everyone amazed. So let’s begin. So you are going from Zero to a Hero!

For many students calculation of squares are really tough. However, set of numbers that end with 5 can quite easier than before.

  • Let’s take the number 95 and attempt to find its square.
  • As per the trick, start by writing the last two digits of the answer, which is 25 (the last two digits of the square of any number that ends with a 5 is 25).
  • Now, the first digit in 95 is 9. The number that follows 9 is 10.
  • Multiply 9 and 10 to get the answer, which is 90.
  • Write 90 in the prefix of the 25 we already wrote as the answer. This makes the complete solution is 9025.

Most children do end up memorizing the multiplication tables up to 10. Besides, this can be taken one step further by knowing how to quickly multiply with 11 as well.

  • Let’s try multiplying 45 with 11.
  • Separate the digits, 4 and 5 with a space between them, such as 4 [ ] 5.
  • Now, carry out the addition of the two digits in the centre, such as 4 [4+5 = 9] 5.
  • That’s your answer. 45 x 11 = 495.
  • If the sum happens to be a two digit number, such as with 56, which yields 5 [11] 6, simply add the tens place of the sum with the first digit.
  • This would then be [5+1 = 6] [1] 6, making the answer as 616.

And in many cases multiplying any number by 9 can be even faster.

  • Take a large number such as 754.
  • To multiply this with 9, simply add a 0 at the end and subtract the original number.
  • That makes it 7540 – 754 = 6786. That’s how quick it is!

Also it is  easier with single digits. Moreover, what if you could multiply just as fast with 15 as well?  Let’s check

  • Let’s try multiplying 79 with 15.
  • Add a zero to the end of the number, making it 790.
  • Divide it by 2, giving the answer as 790 / 2 = 395.
  • Add those two numbers, which would be 395 + 790 = 1185.
  • Verify it with the calculator, too.

Make the answer 37 every time.

  • Choose a 3 digit number with same digits. Let’s go with 333.
  • Add the digits together. So, 3 + 3 + 3 = 9.
  • Divide the original number with this sum. So, 333 / 9 = 37.
  • This works every single time.

A step up from the previous one, this works on choosing any number at all.

  • Let’s choose the number 53.
  • Subtract 1 from it, so 53 – 1 = 52.
  • Multiply by 3, so 52 x 3 = 156.
  • Add 12 to it. So, 156 + 12 = 168.
  • Divide this by 3. So, 168 / 3 = 56.
  • Add 5 to this answer and subtract the original number. So, 56 + 5 – 53 = 8.

Finally, let’s try another that can surprise your friend in guessing his age. He will be amazed!

  • Let’s assume your friend is 8 years old and he has two 5 rupee coins and four 2 rupee coins, bringing his total change to 18 rupees.
  • Ask your friend to multiply his age by 2. So, 8 x 2 = 16.
  • Add five to the answer. So, 16 + 5 = 21.
  • Multiply this answer by 50. So, 21 x 50 = 1050.
  • Subtract 365 from that answer. So, 1050 – 365 = 685.
  • Ask your friend to add the total value of the change to this answer. So, 685 + 18 = 703.
  • Add 115 to this answer. So, 703 + 115 = 818.
  • Look at this answer. The last two digits are the amount of change he has, and the first two digit is his age.

Also read @https://careercore.in/how-to-be-smart-in-an-interview-go-with-some-tips.html