User blog:Googleaarex/Multiplication numbers

Let X is 10.

Multiplication numbers start with 20 or 2(X)

n(m) = n*m

20 = 2(X) 21 = (2(X))+1 22 = (2(X))+2 20+n = (2(X))+n 30 = 3(X) 30+n = (3(X))+n 40 = 4(X) 40+n = (4(X))+n 10*n = n(X) (10*n)+m = (n(X))+m 100 = X(X) 110 = X+1(X) 200 = 2(X)(X) 1000 = X(X)(X)