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Question
If $$70, 75, 80, 85$$ are the first four terms of an arithmetic progression, then the 10th term is ______.
Options
$$35$$
$$25$$
$$115$$
$$105$$
MCQ
Fill in the Blanks
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Solution
If $$70, 75, 80, 85$$ are the first four terms of an arithmetic progression, then the 10th term is 115.
Explanation:
The common difference is $$5$$, hence $$\mathrm{T}_{10} = 70 + 9(5) = 115$$.
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