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SEAMO 2016 — Paper D — Grade 7–8 Question 5

SEAMO · SEAMO 2016 — Paper D — Grade 7–8

Question 5

Primes $m,n$ satisfy $m+n=21$. Find the possible values of $(2n+1)/m$.
  1. $\frac5{19},\frac{39}2$
  2. $\frac9{17},\frac{17}9$
  3. $\frac{17}{13},\frac{13}{17}$
  4. $\frac{23}{10},\frac{21}{10}$
  5. None of the above