The G.C.D. of two whole numbers is 5 and their LCM is 60. If one of the number is 20, then the other number would be

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1. 15

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2. G.c.d=num1 *num2/lcm
   Num1=20
   Gcd=5
   Lcm=60
   5=(20*num2)/60
   Num2= 5*60/20
   Num2=15

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