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Q 15. The sum of the digits of a two digit number is 8 when the digits areinterchanged the new numbers is 18 more than the given number. Find thenumber. |
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Answer» let once digit=Xtens digit=Ythen number=X+10Y sum=X+Y=8 Y=8-X when digits are interchanged thennumber=Y+10X according to question,X+10Y+18=Y+10Xputting value of Y,X+10(8-X)+18=8-X+10XX+80-10X+18=8+9X98-8=9X+9X18X=90X=5. then. Y=8-5=3therfore number=5+10×3 =5+30 =35. ans. lcome back! You get 5 points for logging in today.  |
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