Progressions – Aptitude MCQ Questions – 05 Posted on July 9, 2020July 9, 2020 by admin Question 1If 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 2If 18, a, b - 3 are in A.P. then a + b = A. 19 B. 7 C. 11 D. 15 Question 3If 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 4 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 5What 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 6The 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 7 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 8If 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 9What is the sum of the following series? -64, -66, -68, ......, -100 A. -1458 B. -1558 C. -1568 D. -1664 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