Progressions – Aptitude MCQ Questions – 05 Posted on July 9, 2020July 9, 2020 by admin Question 1If Sn denote the sum of the first n terms of an A.P. If S2n = 3Sn , then S3n : Sn is equal to A. 4 B. 6 C. 8 D. 10 Question 2What is the sum of all positive integers up to 1000, which are divisible by 5 and are not divisible by 2? A. 10,050 B. 5050 C. 5000 D. 50,000 Question 3 Sum of n terms of the series √2+√8+√18+√32+ ....... is A. n(n+1)/2 B. 2n(n+1) C. n(n+1)/√2 D. 1 Question 4What is the sum of the following series? -64, -66, -68, ......, -100 A. -1458 B. -1558 C. -1568 D. -1664 Question 5If the sum of n terms of an A.P. is 3n2 + 5n then which of its terms is 164 ? A. 26th B. 27th C. 28th D. None of these Question 6If 18, a, b - 3 are in A.P. then a + b = A. 19 B. 7 C. 11 D. 15 Question 7The first and last term of an A.P. are a and l respectively. If S is the sum of all the terms of the A.P. and the common difference is given by l2−a2/k−(l+a) then k = ? A. S B. 2S C. 3S D. None of these Question 8If 18th and 11th term of an A.P. are in the ratio 3 : 2, then its 21st and 5th terms are in the ratio A. 3 : 2 B. 3 : 1 C. 1 : 3 D. 2 : 3 Question 9 If the sums of n terms of two arithmetic progressions are in the ration 3n+5/5n+7 then their nth terms are in the ration A. 3n−1/5n−1 B. 3n+1/5n+1 C. 5n+1/3n+1 D. 5n−1/3n−1 Question 10A piece of equipment cost a certain factory 6,00,000. If it depreciates in value, 15% the first year, 13.5% the next year, 12% the third year, and so on, what will be its value at the end of 10 years, all percentages applying to the original cost? A. Rs. 2,00,000 B. Rs. 1,05,000 C. Rs. 4,05,000 D. Rs. 6,50,000