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27 Nov 2022, 12:45
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B
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Difficulty:
55%
(hard)
Question Stats:
63% (02:19) correct
37%
(01:52)
wrong
based on 95
sessions
History
Date
Time
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Not Attempted Yet
A mathematics teacher prepares the visual representation of the factors of a number as per the following logic: each odd factor of a number is represented on a unique sheet of green paper and each even factor of a number is represented on a unique sheet of red paper. If all red sheets are priced equally and all green sheets are priced equally, what is the cost (in cents) of the visual representation of the factors of 275?
(1) The visual representation of the factors of 70 costs 12 cents
(2) The visual representation of the factors of 15 costs 4 cents
(1) The visual representation of the factors of 70 costs 12 cents
(2) The visual representation of the factors of 15 costs 4 cents
Archit3110
Major Poster
28 Nov 2022, 02:14
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given
each odd factor of a number is represented on a unique sheet of green paper and each even factor of a number is represented on a unique sheet of red paper
if all red sheets are priced equally and all green sheets are priced equally
odd is green and even is red
275 ; 5^2 * 11
total odd factors ; 6 so 6 green sheets required
#1
The visual representation of the factors of 70 costs 12 cents
70 = 2 * 5 * 7
2 red + 4 green = 12 cents
1 red + 2 green = 6 cents
insufficient
as red can be 2,4 and green 4,2
#2
The visual representation of the factors of 15 costs 4 cents
15 = 3 * 5
green ; 4
4 x= 4 cents
x = 1 cent each
sufficient
option B
each odd factor of a number is represented on a unique sheet of green paper and each even factor of a number is represented on a unique sheet of red paper
if all red sheets are priced equally and all green sheets are priced equally
odd is green and even is red
275 ; 5^2 * 11
total odd factors ; 6 so 6 green sheets required
#1
The visual representation of the factors of 70 costs 12 cents
70 = 2 * 5 * 7
2 red + 4 green = 12 cents
1 red + 2 green = 6 cents
insufficient
as red can be 2,4 and green 4,2
#2
The visual representation of the factors of 15 costs 4 cents
15 = 3 * 5
green ; 4
4 x= 4 cents
x = 1 cent each
sufficient
option B
Bunuel
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