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OG2015 DS If n + k = m

This topic has 1 expert reply and 0 member replies
lionsshare Senior | Next Rank: 100 Posts
Joined
09 Aug 2017
Posted:
62 messages

OG2015 DS If n + k = m

Post Sat Sep 16, 2017 2:13 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    If n + k = m, what is the value of k?

    (1) n = 10
    (2) m + 10 = n

    OA: B

    Please, anyone, share the solution to this problem. Thank you.

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    Post Sat Sep 16, 2017 3:16 am
    lionsshare wrote:
    If n + k = m, what is the value of k?

    (1) n = 10
    (2) m + 10 = n

    OA: B

    Please, anyone, share the solution to this problem. Thank you.
    Statement 1: n = 10

    By plugging in the value of n = 10 in the equation n + k = m, we get 10 + k = m. Thus, k = m - 10. But we do not know the value of m, so we cannot get the value of k. Insufficient.

    Statement 2: m + 10 = n

    => 10 = n - m; by transposing m to LHS

    Since from the given equation n + k = m, we get m - n = k, thus, k = 10. Sufficient.

    The correct answer: B

    Hope this helps!

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