Answer:Hello,
Let's assume
a the lowest number
b the tallest.
HCF(a,b)=56
LCM(a,b)=1568
a*b=HCF*LCM=(2^5*7^2)*(2^3*7)=2^8*7^3
a=56*x
b=56*y
a*b=56²*x*y==>x*y=2^2*7
The numbers possible are (56*1,56*28),(56*2,56*14),(56*4,56*7)
(56*1,56*28)=(56,1568) is excluded.
(56*2,56*14)=(112,784) has like HCF=112 and not 56.
The answer is (56*4,56*7)=(224,392) which HCF is 56 and LCM=1568.