AAPL wrote: ↑Mon Aug 03, 2020 11:37 am
Economist GMAT
How many multiples of 7 are there between 700 and 1000, inclusive?
A. 43
B. 42
C. 22
D. 21
E. 20
1000/7 ≈ 142
Thus:
Greatest multiple of 7 in the set = 142*7
Since the smallest value = 100*7, while the greatest value = 142*7,
the count is equal to the number of integers between 100 and 142, inclusive.
For any set of consecutive integers:
TOTAL NUMBER OF INTEGERS = BIGGEST - SMALLEST + 1
Thus we get:
142 - 100 + 1 = 43
The correct answer is
A.
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