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Q&A for How to Do a Number Trick to Guess Someone's Age

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This doesn't make sense. How does 17x50 equal 850? I thought it was 400.

Community Answer

Check your multiplication again. 17x50 does equal 850.

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Question

Can I calculate someone's age by subtracting their birth year from the current year?

Alexis Styles-Rainies-Thompson

Community Answer

Yes, you can subtract a person's birth year from the current year to estimate their age. However, this will be accurate only if their birthday has already occurred this year; otherwise, you should subtract one year from the result.

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Question

Is this just a trick or does it really help you guess someone's age?

Community Answer

If done correctly, this should actually help you determine a person's age.

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Question

How do I do the number trick to find out when I was born?

Community Answer

You would still need to know your birth year in order to perform the trick.

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Question

I did this trick, and I got the wrong answer. I'm sure I did all the steps correctly. How can this be?

I_l1ke_gam3s

Community Answer

You must have made a miscalculation. Check your work to see if you calculated correctly.

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Question

I made absolutely sure that I did the first solution correct and the final answer was 6 years off from their actual age.

Community Answer

Method 1 above does work. Step 5 is a little tricky. The number you use in that step changes every year! (Note the explanation at the bottom of Step 5.) Be sure you're using the right number! Try the method on yourself!

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Question

What if the answer is a single digit?

WikiIbisWatcher403

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If the result is a single digit, look at the first number of the total answer. For example, if you end up with 756, your age would be 7.

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