Official papers

Official 2022 Paper 2 · Q3

Paper 2Logic & proofNumber & counting

Consider the following statement about the positive integer nn:

if nn is prime, then n2+2n^2+2 is not prime

Which of the following is a counterexample to this statement?

  • I. n=2n=2
  • II. n=3n=3
  • III. n=4n=4
Anone of them
BI only
CII only
DIII only
EI and II only
FI and III only
GII and III only
HI, II and III

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