2011-11-05, 08:14 PM
Hi guys. I'm here to challenge all the mathy/puzzle loving people of SP. Even if you don't consider yourself a part of this category, give these a shot! You never know, you might see something they don't 
Let's begin!
1) What two numbers, that between them contain the digits 1 through 9, have the largest product when multiplied?
ex: 12345*6789 are two numbers that multiply to 83810205, but you can do better than that! As you can see I used each of the nine digits only once!
2) Use the numbers 987654321 in that order. Add in any + - signs where ever is needed to make an expression that totals to 100.
ex 9+8+7+654-321=(not 100). Your job is to find an expression that does. But you MUST keep the numbers in that order. Multiple solutions.
(I'll add in more later. Try not to cheat please :O It ruins the fun of the people trying these.)
Let's begin!
1) What two numbers, that between them contain the digits 1 through 9, have the largest product when multiplied?
ex: 12345*6789 are two numbers that multiply to 83810205, but you can do better than that! As you can see I used each of the nine digits only once!
2) Use the numbers 987654321 in that order. Add in any + - signs where ever is needed to make an expression that totals to 100.
ex 9+8+7+654-321=(not 100). Your job is to find an expression that does. But you MUST keep the numbers in that order. Multiple solutions.
(I'll add in more later. Try not to cheat please :O It ruins the fun of the people trying these.)