Progressions - CAT 2010 Sample Questions

A topic from which you could get at most one or two questions in the CAT.

Here is a collection of typical questions that appear in MBA entrance tests such as IIM's CAT in Progressions. Arithmetic, Geometric progressions are favorites. Sometimes, concepts on harmonic progressions could get tested.

1. Question 1  A gentleman buys every year Bank's cash certificates of value exceeding the last year's purchase by Rs. 300. After 20 years, he finds that the total value of the certificates purchased by him is Rs. 83,000. Find the value of the certificates purchased by him in the 13^th year.
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2. Question 2  The sum of the first 50 terms common to the Arithmetic Sequence 15, 19, 23..... and the Arithmetic Sequence 14, 19, 24 ... is
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3. Question 3  What is the sum of all the integers which are multiples of 7 from between 200 to 400?
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4. Question 4  The sum of the first and the 9^th of an arithmetic progression is 24. What is the sum of the first nine terms of the progression?
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5. Question 5  The sum of the first 20 terms of the series -1² + 2² - 3² + 4² - 5² + 6² ... is:
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