an infinite number. 1x168, 2 x 84, 3x56, 4x42, 6x28, 7x24, 8x21, 12x14, but you can also use decimals and fractions and negative numbers as well. 1/2 x 336, 0.1 x 1680 etc
How about: 5*9 = 45 as one example
2.5 x 2 and 1 x 5
As many as desired. An infinite number is possible.
1 x 41, 41 x 1
24x1, 12x2, 8x3, 6x4
22x111x21x222x11
1x82x4
Infinite
Infinitely many.
70*1.1 is one example.
3 are the ones i counted
How about: 5*9 = 45 as one example
Any, and every, multiplication problem must be "less than equal to or greater than one".
2.5 x 2 and 1 x 5
As many as desired. An infinite number is possible.
1 x 41, 41 x 1
24x1, 12x2, 8x3, 6x4