Question 638668
let a,b,c are the three no's
given third no is twice the first
then c=2a
and second no is thrice the first
then b=3a
also given that 
a+b+c=210
a+3a+2a=210
6a=210
a=35
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b=3a
b=3x35
b=105
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c=2a
c=2x35
c=70
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now check if a+b+c=210
     35+105+70=210
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