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Aptitude | Arithmetic Aptitude 4 | Question 1

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Raghav has got a bag of numbers from 1 to 500, however he want to remove the numbers those are multiple of 9. How many total numbers will be removed?

(A)

44

(B)

55

(C)

50

(D)

52


Answer: (B)

Explanation:

The required numbers are 9, 18, 27, 36, 45……450, 459, 468, 477, 486, 495

This is an A.P. with a = 9 and d = 9

Let it has n terms.

Then Tn = 495 = 9 + (n-1) x9

∴ 495 = 9 + 9n - 9

∴ 9n = 495

∴ n = 55


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Last Updated : 28 Jun, 2021
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