840
Write them as decimals, and compare. If the first digit of two numbers is equal, compare the second digit; if the second digit is equal, compare the third digit, etc.
1 x 5 x 6 x 9 2 x 3 x 5 x 9 3 x 3 x 5 x 6
20
11 and 18
840
There are no three-digit numbers that equal 17. In fact, there are no numbers with more or less than two digits that equal 17. In fact, in the whole infinite supply of numbers, there is only one single number that equals 17. That number is . . . . . . . 17 .
There are five such numbers.
Write them as decimals, and compare. If the first digit of two numbers is equal, compare the second digit; if the second digit is equal, compare the third digit, etc.
1,2,23 and 46 are the only even factors of 46 so this is impossible
no 3 numbers add to equal 10 and multiply to equal 40.
1 x 5 x 6 x 9 2 x 3 x 5 x 9 3 x 3 x 5 x 6
The two numbers you can multiply together to equal 782 are 23 by 34.
The two numbers you multiply together to equal 391 are 17 by 23.
The 2 numbers that multiply together to equal 678 are 6 and 113.
-3888
2x25