a, b, c and d are negative integers. If ab + ac + ad = 0 then a × b × c × d is always
A. Odd
B. Even
C. Zero
D. None of these
Answer: Option B
Solution(By Examveda Team)
Given that ab + ac + ad = 0Hence, out of these three terms, some are positive and some are negative. Since all of a, b, c, and d are negative integers, only that term which has an even power can be positive. Hence, the absolute value of at least one of a, b, c or d is even. Hence, a × b × c × d is also even
Related Questions on Number System
Three numbers are in ratio 1 : 2 : 3 and HCF is 12. The numbers are:
A. 12, 24, 36
B. 11, 22, 33
C. 12, 24, 32
D. 5, 10, 15
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