Question

Half of a certain no. Added to its one thirdgives15. Find the no.

Answer 1

let the number = x

half of number = x/2

one third of number = x/3

given that x/2 + x/3 = 15

⇒(3x + 2x)/6 = 15

⇒ 5x = 15×6

⇒ x = 90/5 = 18

hence required number is 18

Answer 2

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=> Let the no. be X

=> Half of the no. be x/2

=> One third of the No. be x/3
Then ,
According to the Question ,

=> x/2 + x/3 = 15

=> 3x + 2x / 6 = 15

=> 5x = 15 × 6

=> 5x = 90

=> x = 90/ 5

=> x = 18

So , the Required No. be 18
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