If 21 # 11 = 5, 18 # 4 = 7 and 6 # 2 = 2, then find the value of 13 # 5 = ?

PYQ SSC JE (Junior Engineer) 2018

If 21 # 11 = 5, 18 # 4 = 7 and 6 # 2 = 2, then find the value of 13 # 5 = ?

  1. A.

    4

  2. B.

    8

  3. C.

    18

  4. D.

    65

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