GMAT Quantitative Reasoning Practice Test 3

Question : 52 of 100

Marks: +1, -0

A certain church bell rings the bell twice at half past the hour and four times at the hour plus an additional number of rings equal to what ever time it is. How many rings will the clock make from 6:20 in the morning to 10:10 in the morning?

Validate

Solution:

Let's start from the top. The first two rings will be at

6: 30

from there there'll be 2 rings ever half past the hour until ten, at 7:30, 8:30 and

9: 30

. That will sum up to 8 rings total. The bell will also ring at 7:00 - 8 rings, at

8: 00-9

rings, at

9: 00-10

rings and at

10: 00-11

rings. The total number of rings is:

8+8+9+10+11=46

rings.

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