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16 Sep 2014, 01:21
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How many odd integers between 200 and 600 are there such that their tens digit is even?
A. 20
B. 25
C. 100
D. 150
E. 200
A. 20
B. 25
C. 100
D. 150
E. 200
16 Sep 2014, 01:21
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Official Solution:
How many odd integers between 200 and 600 are there such that their tens digit is even?
A. 20
B. 25
C. 100
D. 150
E. 200
The hundreds digit has 4 possible values: 2, 3, 4, and 5.
The tens digit has 5 possible values: 0, 2, 4, 6, and 8.
The units digit has 5 possible values: 1, 3, 5, 7, and 9.
Thus, the total number of odd integers is \(4 * 5 * 5 = 100\).
Answer: C
How many odd integers between 200 and 600 are there such that their tens digit is even?
A. 20
B. 25
C. 100
D. 150
E. 200
The hundreds digit has 4 possible values: 2, 3, 4, and 5.
The tens digit has 5 possible values: 0, 2, 4, 6, and 8.
The units digit has 5 possible values: 1, 3, 5, 7, and 9.
Thus, the total number of odd integers is \(4 * 5 * 5 = 100\).
Answer: C
General Discussion
23 Oct 2023, 03:00
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I've revised the question and solution, incorporating additional details for improved clarity. I trust this makes it more comprehensible.
