Mathematical Puzzle

maj

OK everybody.... Get out your calculators and try this.

Take your house number and multiply it by 2, add 5, then multiply that number by 50, add your age, add 365. Then subtract 615 from that number.

The two numbers on the right should be your age, and the numbers on the left should be your house number.

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jmic

Neat.

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Peladu

NICE, maj .... I like math...

The evolution in teaching math since the 1950s:

1. Teaching Math In 1950
A logger sells a truckload of lumber for $100 . His cost of production is 4/5 of the price. What is his profit?

2. Teaching Math In 1960
A logger sells a truckload of lumber for $100. His cost of production is 4/5 of the price, or $80. What is his profit?

3. Teaching Math In 1970
A logger sells a truckload of lumber for $100. His cost of production is $80. Did he make a profit?

4. Teaching Math In 1980
A logger sells a truckload of lumber for $100. His cost of production is $80 and his profit is $20. Your assignment: Underline the number 20.

5. Teaching Math In 1990
A logger cuts down a beautiful forest because he is selfish and inconsiderate and cares nothing for the habitat of animals or the pre servation of our woodlands. He does this so he can make a profit of $20. What do you think of this way of making a living? Topic for class participation after answering the question: How did the birds and squirrels feel as the logger cut down their homes? (There are no wrong answers. )

6. Teaching Math In 2006
Un hachero vende una carretada de maderapara $100. El costo de producciones es $80.

Peladu

Spin on the one that maj showed....

1. Grab a calculator. (you won't be able to do this one in your head)
2. Key in the first three digits of your phone number (NOT the area >> code)
3. Multiply by 80
4. Add 1
5. Multiply by 250
6. Add the last 4 digits of your phone number
7. Add the last 4 digits of your phone number again.
8. Subtract 250
9. Divide number by 2

Do you recognize the answer?

dirt diggler

freaking hilarious

TonyD

Thats kind of obvious to me :

1. The 365 from 615 is 250
2. the 5 added times the 50 is the 250
3. the house number multiplied by 2 then 50 is just putting to zeros after the house number
4. then your just adding your age.

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maj

OK...... .......Sorry Tony

Just thought of it as a fun little math puzzle. Didn't mean to stir the hornets nest again..... sheez.

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dumplin1078

This is another cool one.

1. Multiply the first three numbers of you SSN by 10.

2. Add 500 to that number.

3. multiply that by 2.

4. Subtract the next two numbers of your SSN.

5. Add 20.

6 multiply that number by 5226.

7. Subtract the last two minutes of your life you can never get back.

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ron schenker

Thanks alot guys Now my calculator battery is dead

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Double-A

Look at the bright side! Now you can just pull the numbers out of your back pocket like the competition does! Woot!

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TonyD

Keep em' coming!!

1. any number multiplied by 80 then 250 is basically multiplying by 20000 that just doubles and adds 4 zeros
2. by adding the 1 and multiplying by 250 then subrtacting 250 thats called canceling out.
3. then adding the last four digits twice and dividing by two...you see were i'm going.

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Abraham Lincoln

Peladu

Tony .... it's not magic, and can be figured out, as most mathematical puzzles ... most know that all of the information is given by the 'end-user' ... but it seems like you enjoy cracking the code more than you like the end result of the puzzle .... I am the same way...