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Seven times a 2- digit no …

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Seven times a 2- digit no is equal to four times the number obtained by reversing the order of the digits if the difference of the digits is 3 . Find the number

    • Posted by Dharani Vinayak 5 years, 1 month ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    ........ ...... 5 years, 1 month ago

    Let the no at tenths place= x And the no at ones place=y :. the no will be (10x+y) A/Q 7(10x+y)=4(10y+x) 70x+7y=40y+4x 66x=33y x=y/2 Given the difference between them is 3. Since x is less then y-x=3 Put the value of x y-y/2=3 y=6 : . x=3 Hence, the original no is 36 and the reverse no is 63.

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