Mind Reading Trick 2: The Answer is 4

This is the second mind reading trick in this blog. The first one was titled “The Answer is 3!

The Mind Reading Trick

Step 1: Think of a number.

For example, we think of 8.

Step 2: Multiply it by 3.

Now, 8 multiplied by 3 equals 24.

Step 3: Add 12.

12 + 24 = 36

Step 4: Divide by 3.

36/3 = 12

Step 5: Subtract the original number. The answer is 4.

12 – 8 = 4.

Note that whatever number you chose in Step 1, the final answer after step 5 will always be 4. If you don’t believe me try other numbers. 🙂

 The Secret Behind the Trick

Like the previous mind reading trick, the secret behind this trick can be revealed using simple Algebra. If we let n be the number, then we can think of the steps above in terms of n.

Step 1: Think of a number.

This time let’s think of our number as n.

Step 2: Multiply it by 3.

The product of 3 and n is 3n.

Step 3: Add 12.

The sum of 3n and 12 is 3n + 12.

Step 4: Divide by 3.

Dividing 3n + 12 by 3 results to n + 4.

Step 5: Subtract the original number. The answer is 4.

Since the original number is n,

n + 4 – n = 4.

That is the secret behind the mind reading trick above.

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