Hi,
If and are consecutive integers such that and the units digit of the product is , what is the units digit of ?
A. 0
B. 1
C. 2
D. 3
E. 4
I guessed E once but my final answer is C.
The question is a bit unclear to me. j, k and n are consecutive such that 0 < j < k < n; so 0 < 1 < 2 < 3, but j times n gives me 1 x 3 = 3 and not 9 as the problem states.