If the number of five digit numbers with distinct digits and 2 at the 10th place is 336k, then k is equal to:
Solutions · 1
Official solution
With 2 fixed at the tens place: first digit has 8 choices (not 0, not 2), then remaining 3 positions filled from remaining 8 digits: 8×8×7×6=2688.
\[336k = 2688 \implies k = 8\]