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If a and b are positive integers and a × b is odd, choose al
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02 Jan 2021, 02:18
02 Jan 2021, 02:18
Expert Reply
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Question Stats:
80% (00:47) correct
20% (00:33) wrong based on 15 sessions
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If a and b are positive integers and \(a × b\) is odd, choose all the true statements.
A. a and b are prime numbers.
B. \(ab^2\) is odd.
C. a – b is odd.
D. a + b is even.
A. a and b are prime numbers.
B. \(ab^2\) is odd.
C. a – b is odd.
D. a + b is even.
Re: If a and b are positive integers and a × b is odd, choose al
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03 Jan 2021, 07:56
03 Jan 2021, 07:56
2
a & b - positive integers
a*b - odd
A) a & b are prime. Not necessary. a = 1 & b = 9 :: \(NO\)
B) \(ab^2\) is odd. This will be always odd :: \(YES\)
C) a - b is odd. This can never be true. It will always be an even no. :: \(NO\)
D) a + b is even. This will be true always. :: \(YES\)
a*b - odd
A) a & b are prime. Not necessary. a = 1 & b = 9 :: \(NO\)
B) \(ab^2\) is odd. This will be always odd :: \(YES\)
C) a - b is odd. This can never be true. It will always be an even no. :: \(NO\)
D) a + b is even. This will be true always. :: \(YES\)
Re: If a and b are positive integers and a × b is odd, choose al
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16 Jan 2021, 19:27
16 Jan 2021, 19:27
1
Given that ab= odd, then a and b must be odd.
A- a&b are primes. ==> not all odd numbers are prime, 9 for example is not prime
B- ab^2 = odd. odd^2 is also odd, then yeah this is must be true.
C- a-b= odd ==> odd-odd= always be even.
D- a+b=even ==> odd+odd=even this must be true
Answer; B&D.
A- a&b are primes. ==> not all odd numbers are prime, 9 for example is not prime
B- ab^2 = odd. odd^2 is also odd, then yeah this is must be true.
C- a-b= odd ==> odd-odd= always be even.
D- a+b=even ==> odd+odd=even this must be true
Answer; B&D.
