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love singh Grade:
        

The digits Of a three digit number form a G.P.If we subtract 792 from this number whose digits are written in reverse order .If we increase the middle digit of a given number by 2, then the digits form an A.P.find numbers? 

7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

DEar love


let the number are ar2,ar,a


 given   ar2,ar+2 ,a  are in AP


        so 2(ar+2) = ar2 +a


             a(r-1)2 =4 .............1


and given   ar2*100 + ar*10 +a -792 = a*100 + ar*10 + ar2


                      a(r2-1)=8 .......2


from equation 1 and 2nd


 a=1 ,r=3


so number are   = 931


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Badiuddin



7 years ago
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