Math Trick 3

Today we are going to tell you about a math trick which can be used in everyday life by both adults and kids. With this trick, one will be able to multiply any number with 5 and get the result in seconds.

So, next time whenever you have to multiply a number with 5, do not do it.

You must be wondering that how are we going to get the result if we do not multiply the number by 5.

Simple, divide the number by 2.

Confused?

Don’t be.

Math Trick for Multiplication with 5magic-hat-psd

Below is a step-wise description of this easy trick:

Step 1: Identify the number that has to be multiplied with 5.

Step 2: Next, divide the number with 2.

Step 3: To get the final result, check whether the number identified in Step 1 is an even number or an odd one.

Step 4:

  1. If the original number is an even number, add a zero at the end of the result obtained in step 2.
  2. In the case of odd number, the result obtained in step 2 would be a partial number with a decimal and a 5 after the decimal.
  3. To obtain the final result, in this case, just remove the decimal point from this number and include the 5 into it.

Voila! you have the answer.

Multiplication with 5 – Examples

Suppose, we have to multiply 3,746 with 5. With our math trick, we can accomplish this within seconds. How? Read ahead.

Step 1: Identify the number to be multiplied with 5. Here it is 3,746.

Step 2: Divide 3,746 by 2. The result is 1,873.

Step 3: Check whether the number identified in Step 1 is an even number or an odd number. 3,746 is an even number.

Step 4: To get the final result, just add a ‘0’ at the end of the result obtained in Step 2. In this case, it is 1,873. The final answer of multiplying 3,746 with 5 is 18,730.

To verify the authenticity of the trick, take a calculator and multiply 3,746 with 5. The result will be 18,730.

3746

Trying with an odd number

Let us use this trick to multiply an odd number with 5.

Suppose, we have to multiply 2,983 with 5.

Step 1: Identify the number to be multiplied with 5. Here it is 2,983.

Step 2: Divide 2,983 by 2. The result of this step is 1,491.5.

Step 3: Check whether the number identified in Step 1 is an even number or an odd number. 2,983 is an odd number.

Step 4:  To get the final result we remove the decimal point from the result obtained in Step 2. In this case, it is 1,491.5. The final answer of multiplying 2,983 with 5 is 14,915.

Once again, you can verify the result with the help of a calculator. We can bet that the answer will be 14,195.

2983

Is it magic?

No. Although this trick may seem like magic, it is not. Nothing in math is magic. In fact, everything in math is the play of logic. If you want to call the math logic as magic then sure you can. After all, we are here to turn you into math wizards only.

How does this work?

You must be wondering what logic has led to the advent of this trick.

The trick makes use of the ease of dividing any number by 2. The times 2 table is the first and the most well-remembered times table of all the numbers. Also, we all know how easy it is to multiply any number with 10. And that is where the crux of this math trick lies.

The trick has made use of the above given simple concepts and has simplified multiplying any number with 5 for us. In this trick instead of multiplying a number with 5, we are simply dividing it by 2 and multiplying it by 10. Basically, multiplying the number with 10/2, a fraction which when reduced to its simplest form results in 5.

final trick

Interesting isn’t it?

Now that you have this amazing trick up your sleeve, go ahead and floor your peers by letting them give you any number to multiply with 5. Also, do not forget to tell your kids about this amazing math trick. It will help them greatly in their ms and even daily life.