# GMAT Question of the Day : Word Problem

A certain culture of bacteria quadruples every hour. If a container with these bacteria was half full at 10:00 a.m., at what time was it one-eighth full?

(A) 9:00 a.m.
(B) 7:00 a.m.
(C) 6:00 a.m.
(D) 4:00 a.m.
(E) 2:00 a.m.

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1. Krishna Mohan says:

A.

2. Anusha says:

A

3. valmik desai says:

(A) 9:00 a.m

4. V Pat says:

(A) 9:00 a.m.

5. AJ says:

a

7. AP says:

a

8. Narayan says:

Ans: a. At 10AM it was x/2 at 11am it will be (x/2)*4 = 2x and at 9AM is was (x/2)/4 = x/8.

9. Rajib Banerjee says:

A) Since it takes 1 hr to become 4 times so we can infer that it would also take 1 hr to become 1/4th. By reverse calculation, 1/2 can reduce to 1/8th, if we divide it by 4 in exactly 1 hr and that makes 9 AM the right answer.

10. Ronak says:

A

11. Ashu says:

A

12. 10g says:

A

13. deepakraam says:

Easy one. Clearly option A

14. Vaibhav says:

A..

15. Rajat says:

A