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      Question

      The Least Common Multiple of two prime numbers x and y,

      (x < y) is 145. Then what is the value of (10x -y)? 
      A 21 Correct Answer Incorrect Answer
      B 30 Correct Answer Incorrect Answer
      C 27 Correct Answer Incorrect Answer
      D 40 Correct Answer Incorrect Answer

      Solution

      LCM of primes For two primes, LCM = product. So, x × y = 145. Factorize 145 145 = 5 × 29 (both primes). Thus, x = 5 ,y = 29 (since x

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