Math Brain Teasers
1. Write your age. Add 90 to it. Cross off the first digit and add it to what is left. Subtract 9 from this number (IF you are OVER age 10, add 9 rather than subtracting), What did you get?
Bonus time....How come that works?
Bonus time....How come that works?
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2. Choose a number. Multiply it by 100. Subtract the original number. Add the digits. What did you get?
Bonus time....How come that works?
Bonus time....How come that works?
3. Write your age. Multiply your age by 3. Add 1. Multiply by 3. Add your age. What did you get? Cross off the last digit of that number, and you'll have your age.
Bonus time....How come that works?
Bonus time....How come that works?
4. Write a number. Add 6. Multiply the sum by 2. Subtract the original number. Subtract the original number again. Subtract 8. What did you get?
Bonus time....How come that works?
Bonus time....How come that works?
5. Choose any number. Multiply that number by 2. Add 5. Multiply by 50. Subtract 365. Add another number. Add 115. What do you get?
Bonus time....How come that works?
Bonus time....How come that works?