Multiple choice

If 'p' is an integer, which of the following cannot be equal to zero?

(i) p - 1 (ii) p + 1 (iii) p2 - 1 (iv) p2 + 1

  1. Only (ii) and (iv)

  2. Only (iii)

  3. Only (iv)

  4. Only (i) and (iii)

  5. Only (ii), (iii) and (iv)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

p2 + 1 will always give a positive number.

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