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SEAMO 2016 — Paper C — Grade 5–6 Question 16

SEAMO · SEAMO 2016 — Paper C — Grade 5–6

Question 16

Whole numbers $r,s,t,u$ satisfy $2^r3^s5^t7^u=252$. Find $r+2s+3t+4u$.
  1. $4$
  2. $6$
  3. $8$
  4. $10$
  5. None of the above