10 Cool Math Tricks That Surprise Friends


Trick 3: And the answer will always be 15

Yet another trick that makes you turn to the number 15 no matter what number you choose.

1: Think of a number, such as 279.
2: Multiply it by 3. So, 279 x 3 = 837.
3: Now add 45 to the answer. So, 837 + 45 = 882.
4: Multiply the answer by 2. So, 882 x 2 = 1764.
5: Divide this answer by 6. This will give you 1764 / 6 = 294.
6: Subtract your original number from this answer.
7: That makes it 294 – 279 = 15. Surprising, right?

Trick 4: Guess the age of your friend

1: Take the year your was born, let’s say 1985
2: Add 12 to the year.(1985 + 12 =1997)
3: Divide by 2.(1997/2 = 998.5)
4: Subtract 1000 from the answer in the step 3.(1000 – 998.5=2.5)
5: Multiply by the result with 10.(2.5 x 10 =25)
6: Add 9 to the result in step 5.(25+9=34). The result is the age of your Friend

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