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A math teacher has 30 cards, each of which is in the shape of a geomet
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16 Jul 2021, 22:35
16 Jul 2021, 22:35
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A math teacher has 30 cards, each of which is in the shape of a geometric figure. Half of the cards are rectangles, and a third of the cards are rhombuses. If 8 cards are squares, what is the maximum possible number of cards that re circles.
A. 9
B. 10
C. 11
D. 12
E. 13
A. 9
B. 10
C. 11
D. 12
E. 13
Re: A math teacher has 30 cards, each of which is in the shape of a geomet
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17 Jul 2021, 08:49
17 Jul 2021, 08:49
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Squares can be both rectangles and rhombuses.
So, we can solve this question as we solve questions of sets.
Rectangles = 15
Rhombuses = 10
Squares = both rectangles and rhombuses = 8
Hence, number of figure which are at least one of these shapes = 15+10 - 8 = 17
Therefore, the number of remaining figures, all of which may be circles = 13
The correct answer is E.
So, we can solve this question as we solve questions of sets.
Rectangles = 15
Rhombuses = 10
Squares = both rectangles and rhombuses = 8
Hence, number of figure which are at least one of these shapes = 15+10 - 8 = 17
Therefore, the number of remaining figures, all of which may be circles = 13
The correct answer is E.
Re: A math teacher has 30 cards, each of which is in the shape of a geomet
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05 Mar 2024, 20:45
05 Mar 2024, 20:45
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