IBPS PO Reasoning: Series and Sequences questions with solutions

Q1. Directions (75–77): There is a wrong number in each series. Find the wrong number and the pattern of the given series, and answer the question below. Series A: 24, 31.5, 46.5, 69, 98, 136.5, 181.5 Series B: 5926, 886, 166, 46, 22, 18, 14 Series C: 11, 18, 44, 107, 231, 445, 788 Q76. If series D follows the pattern of series C, and the first term of series D is 23 and P and Q are the third and sixth terms respectively of series D, then find the difference between P and Q. (a) 540 (b) 195 (c) 298 (d) 402 (e) 338 A) 540 B) 195 C) 298 D) 402

1. 540
2. 195
3. 298
4. 402
5. 338

Answer: 402

Series C follows a specific recursive or difference-based pattern. Applying the same pattern to series D starting with 23 gives the third and sixth terms, and their difference is 402. The question is a pattern-recognition problem rather than direct arithmetic.

Q2. Read the following alphanumeric-symbol series carefully and answer the question: 0 4 # W U 2 @ 7 R 3 I G % J H 9 B & 5 8 + V N M Ω 6 ¥ 1 How many symbols are just preceded by a number?

1. Five
2. Four
3. Three
4. One

Answer: Four

We need to count only symbols that are immediately preceded by a number. In the series, the symbols after 4, 2, 3, 9, and 8 are #, @, %, &, and + respectively, but only those directly following a number are counted as symbols preceded by a number. The total comes to four.