Question 1055082
 The name
of every student in the school was listed alphabetically and numbered.
The numbers of the first 5 students chosen are listed below. 
21, 26, 31, 36, 41
What will be the number of the 111th student chosen? 
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a(1) = 21
d = 26-21 = 5
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a(111) = 21 + 110*5 = 21 + 550 = 571
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Cheers,
Stan H.
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