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24 Oct 2023, 01:30
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Difficulty:
65%
(hard)
Question Stats:
48% (01:43) correct
52%
(01:44)
wrong
based on 81
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If a is a positive integer, is 105 divisible by a?
(1) a is divisible by 5.
(2) 16 is divisible by a+1.
(1) a is divisible by 5.
(2) 16 is divisible by a+1.
Updated on: 24 Oct 2023, 22:50
Originally posted by ChandlerBong on 24 Oct 2023, 01:48.
Last edited by ChandlerBong on 24 Oct 2023, 22:50, edited 1 time in total.
Last edited by ChandlerBong on 24 Oct 2023, 22:50, edited 1 time in total.
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Given: a > 0.
Asked: Is 105 (3*5*7) divisible by a?
Statement 1: a % 5 = 0.
If a = 5, then we get a "No".
If a - 105, then we get a "Yes".
NS.
Statement 2: 16 is divisible by a+1.
a can be 1,3,7 and 15.
All these values are divisible by 105. Hence Sufficient.
Answer: B.
Asked: Is 105 (3*5*7) divisible by a?
Statement 1: a % 5 = 0.
If a = 5, then we get a "No".
If a - 105, then we get a "Yes".
NS.
Statement 2: 16 is divisible by a+1.
a can be 1,3,7 and 15.
All these values are divisible by 105. Hence Sufficient.
Answer: B.
24 Oct 2023, 22:07
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Hi ChandlerBong,
If 16 is divisible by a+1, then shouldn't a+1 be less than or equal to 16? I think you took the calculation other way round.
Let me know if i'm missing anything
If 16 is divisible by a+1, then shouldn't a+1 be less than or equal to 16? I think you took the calculation other way round.
Let me know if i'm missing anything
