SEAMO 2020 — Paper C — Grade 5–6 Question 6

Question 6

The $101$-digit number consists of fifty $6$s, digit $m$, then fifty $5$s. Find the possible digits $m$ for divisibility by $7$.

$(1,8)$
$(2,6)$
$(2,9)$
$(5,6)$
$(3,7)$