1 x 400, 2 x 200, 4 x 100, 5 x 80, 8 x 50, 10 x 40, 16 x 25, 20 x 20
409
Two consecutive two digit numbers that when multiplied give the product of 812 are 28 and 29.
Yes.
20 and 20
16 and 15
59
You will need to multiply six prime numbers to obtain 400: 400 = 5*5*2*2*2*2
8 and 9
-4 and -4
8 & 16
91 and 2
155