GRE
Exam
Numerical Ability
Algebra
If a and c are positive integers and 4a + 3 = b and 4c + 1 = d, which of the following could be the value of b + d? (A) 46 (B) 58 (C) 68 (D) 74
(E) 82
Read Solution (Total 2)
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- Answer is option C.
adding both b+d = 4a+3+4c+1
b+d = 4(a+c+1)
it means b+d should be be multipleor divisible of 4.
68 mod 4 = 0 - 4 years agoHelpfull: Yes(0) No(0)
- given
4a + 3 = b ==> (1)
4c + 1 = d ==> (2)
----------------------- (add)
4 ( a + b + 1) = b + d
which means (a + b + 1) must divisible by 4 so 68 is ans - 3 years agoHelpfull: Yes(0) No(0)
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