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Finite Series and Pattern Sums
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GMAT
GMAT.107 Finite Series and Pattern Sums
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Let S = 11 + 16 + 21 + ... + 156. Which expression equals S?
A
15(11 + 156)
B
30(11 + 156)
C
15(16 + 156)
D
29(11 + 156)/2
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