CSAT Practice Questions – Series and Progression

1. The maximum value of the sum of the Arithmetic progression 50, 48, 46, 44… is when the number of terms is ….

2. What is the missing number ‘X’ of the series 2, X, 9, 27, 30, 90, 93

3. Second term in an AP is 8 and the 8th term is 2 more than thrice the second term. Find the sum up to 8 terms of this AP.

4. What is the missing number ‘X’ of the series 90, 30, 20, 20, 26.67, X

5. Scores of 30 students in a test are in Arithmetic progression. The lowest score is 30 and the highest score is 88. Then what is the average score of all 30 students in the test?

6. What is the sum of all terms in the infinite series 90, 30, 10……

7. What is the missing number ‘X’ of the series 146, 171, 198, 227, X