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One number is 6 times the other. If their difference is 90, the numbers are ______. - Mathematics

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Question

One number is 6 times the other. If their difference is 90, the numbers are ______.

Options

  • (12, 72)

  • (13, 78)

  • (18, 108)

  • (10, 100)

MCQ
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Solution

One number is 6 times the other. If their difference is 90, the numbers are (18, 108).

Explanation:

Let the smaller number be x,

Then the larger number is 6x, since one number is 6 times the other,

Given:

6x − x = 90

5x = 90

x = `90/5`

∴ x = 18

So the numbers are:

Smaller: x = 18

Larger: 6x = 6(18) = 108

Therefore, the numbers are 18 and 108.

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Chapter 5: Simultaneous Linear Equations - MULTIPLE CHOICE QUESTIONS [Page 60]

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B Nirmala Shastry Mathematics [English] Class 9 ICSE
Chapter 5 Simultaneous Linear Equations
MULTIPLE CHOICE QUESTIONS | Q 7. | Page 60
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