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21 Jul 2021, 02:45
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
79% (01:26) correct
21%
(01:50)
wrong
based on 91
sessions
History
Date
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Not Attempted Yet
−2, 3, −5, −2, 3, −5, −2, 3, −5,…
In the sequence above, the first 3 terms repeat without end. What is the product of the 81st term through the 85th term, inclusive?
A. -450
B. -300
C. -180
D. 180
E. 300
In the sequence above, the first 3 terms repeat without end. What is the product of the 81st term through the 85th term, inclusive?
A. -450
B. -300
C. -180
D. 180
E. 300
21 Jul 2021, 06:32
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IMO : E
Since 81 is a multiple of 3 , the value of the 81st term should be -5 as per below
First term -2
Second term 3
Third term -5
So the sequence of numbers from 81st to 85th terms are -5 , -2, 3 ,-5 and -2
The product is 300. Hence E
Since 81 is a multiple of 3 , the value of the 81st term should be -5 as per below
First term -2
Second term 3
Third term -5
So the sequence of numbers from 81st to 85th terms are -5 , -2, 3 ,-5 and -2
The product is 300. Hence E
21 Jul 2021, 07:25
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81st term will be (3 * 27 pairs) = -5
Then three terms: -2 , 3 , -5
85th term: -2
Product: (-5) * (-2) * (3) * (-5) * (-2) = 300
Answer E
Then three terms: -2 , 3 , -5
85th term: -2
Product: (-5) * (-2) * (3) * (-5) * (-2) = 300
Answer E
