The H.C.F. of 22 x 33 x 55, 23 x 32 x 52 x 7 and 24 x 3 4 x 5 x 72 x 11 is :

• Ans:2
  
  1.2*3*5* 11^3
  
  2.2^7 *7*13*23
  
  3.2^7 * 3^3 * 5*11*17
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• ans is 2:
  22*33*55 which can be written as 2*3*5*11*11*11.
  23*32*52 which can be written as 23*2^5*(4*13)*7=2^7*23*7*13
  24*34*5*72*11 which can be written as (8*3)*(2*17)*5*(8*9)*11=2^7*3^3*17*11
  so 2 is only one common factor so 2 is answer
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