General Aptitude › Numbers › Question #4458
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QWhat is the number that, when doubled and then had 5 added, becomes 105 when trebled?

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#4458Q ID
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  • A 9 ✔ ✖
  • B 15 ✔ ✖
  • C 18 ✔ ✖
  • D 21 ✔ ✖
Correct Answer

Explanation

 The number x is such that 3(2x + 5) = 105.

This equation can be rewritten as 6x + 15 = 105.

 Subtracting 15 from both sides of the equation gives us 6x = 90, 
which means that x = 15.

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