Need math help with The product of two numbers that is 410

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Need math help with The product of two numbers that is 410

  1.   The product of two numbers is 4107. If the H.C.F. of these numbers is 37, then the greater number is:
  2. Three number are in the ratio of 3 : 4 : 5 and their L.C.M. is 2400. Their H.C.F. is:  
  3. the G.C.D. of 1.08, 0.36 and 0.9 is
  4. The product of two numbers is 2028 and their H.C.F. is 13. The number of such pairs is:
  5. The least multiple of 7, which leaves a remainder of 4, when divided by 6, 9, 15 and