Using digits 1,2,3,4,5,6,7,8,9 only once how do you equal 1 million.
Adding, multiplication, subtraction and division
recreational-mathematics
asked 2012-09-30
user id:43194
36
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Do you mean we have to get exactly one million ? – 2012-09-30
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What about constructing numbers, such as 12345, from the digits? I'm pretty sure it won't be possible without that. – 2012-09-30
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@gam3 multiplication by 10 you say? 1*10*10*10*10*10*10. And do we *have* to use each digit 1 time? – 2012-10-01
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@gam3:Since $1+2+3+4+5+6+7+8+9=45$, we only have to reverse a sum of $22$, then multiply by $10$ six times. So (following Dason) (-1-2-3-4-5+6-7+8+9)*10*10*10*10*10*10 with many other similar solutions. – 2012-10-01
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Using the numbers 1,2,3,4,5,6,7,8,9 only once how can you construct the number 1 million using only addition, multiplication, subtraction and division. Intermediate numbers can be created using addition and multiplication by 10, but these numbers can not contain factors of 10. – 2012-10-01