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29 Oct 2019, 00:54
Kudos
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
67% (01:31) correct
33%
(01:37)
wrong
based on 70
sessions
History
Date
Time
Result
Not Attempted Yet
On Monday, Janice started training for a marathon and ran one mile that day. On Tuesday, Janice ran one mile more than she did on Monday. She continues this training process for 12 days. The sum of the total number of miles Janice ran has how many distinct prime factors?
A. 2
B. 3
C. 4
D. 5
E. 6
A. 2
B. 3
C. 4
D. 5
E. 6
29 Oct 2019, 01:09
Kudos
Bookmarks
1,2,...12
(12+1)×6=78
78=2×13×3
Option B
Posted from my mobile device
(12+1)×6=78
78=2×13×3
Option B
Posted from my mobile device
29 Oct 2019, 08:55
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Bunuel
On Monday, Janice started training for a marathon and ran one mile that day. On Tuesday, Janice ran one mile more than she did on Monday. She continues this training process for 12 days. The sum of the total number of miles Janice ran has how many distinct prime factors?
A. 2
B. 3
C. 4
D. 5
E. 6
A. 2
B. 3
C. 4
D. 5
E. 6
total miles ; 12*13/2 = 78
78 prime factors ; 2*3*13
IMO B
