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If positive integers a and b are both odd, which of the following must not be odd?
A. ab
B. a(ab)
C. b – a – 1
D. (a + b)/2
E. a – b
A. ab
B. a(ab)
C. b – a – 1
D. (a + b)/2
E. a – b
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10 Dec 2016, 06:29
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Odd -Odd => Even
Hence E can never be even.
Hence E
Hence E can never be even.
Hence E
10 Dec 2016, 09:10
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If positive integers a and b are both odd.
A. ab ----- Odd * Odd = Odd
B. a(ab)-- Odd * Odd * Odd = Odd
C. b – a – 1 -- Odd - Odd - 1 = Odd
D. (a + b)/2 -- Odd + Odd / 2 = Odd
E. a – b ---- Odd - Odd = Even in all the cases. Hence answer is E.
A. ab ----- Odd * Odd = Odd
B. a(ab)-- Odd * Odd * Odd = Odd
C. b – a – 1 -- Odd - Odd - 1 = Odd
D. (a + b)/2 -- Odd + Odd / 2 = Odd
E. a – b ---- Odd - Odd = Even in all the cases. Hence answer is E.
