(Sample Material) CSAT Online Coaching : Basic Numeracy "Sequences and Series"

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Subject: Basic Numeracy

Topic: Sequences and Series

1. The arithmetic mean of two numbers is 46 and the difference between these numbers is 40. Find the two numbers.

(a) 26, 66

(b) 28, 68

(c) 22, 62

(d) 27, 67

2. If 20 is divided into four parts which are in AP such that the product of the first and fourth is to the product of the second and third is in the ratio 2 : 3.

(a) 1, 3, 7, 9

(b) 2, 4, 6, 8

(c) 3, 5, 5, 7

(d) 4, 6, 3, 7

3. A man saves Rs. 145000 in ten years. In each year after the first year he saved ‘ 2000 more than he did in the proceeding year. How much did he save in the first year?

(a) Rs. 5000

(b) Rs. 5500

(c) Rs. 6000

(d) Rs. 6500

4. The first term of a GP is 2 and the sum to infinity is 6. Find the common ratio.

(a) 2/3

(b) 1/3

(c) 1/2

(d) 2/5

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