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This question consists of a question and two statements numbered I and II. Decide whether the data given in the statements are sufficient to answer the question.
What is the 57th number in a series of numbers?
I. Each number in the series is three more than
the preceding number.
II. The tenth number in the series is 29.
Using $$a_n$$ = a+(n-1)d
=> $$a_57$$=a+56d
From 1, the value of d can be obtained.
From 2, an equation in a and d is obtained.
Hence, both 1 and 2 are necessary to calculate the value of $$a_57$$.
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