IBPS RRB clerk 19 sep 2020 Questions and Answers Detailed Explanation

Answer: (b)

The pattern of the series is as:

7 × 2 + 1 = 15

15 × 2 + 1 = 31

31 × 2 + 1 = 63

63 × 2 + 1 = 127

127 × 2 + 1 = 255

Answer: (a)

Sum of the number of clothes dry cleaned by M on Tuesday and Wednesday

= 75 + 95 = 170

Sum of the number of clothes dry cleaned by L on Wednesday and Thursday

= 85 + 25 = 110

Required Ratio = 17 : 11

Hence, the answer is option A.

Answer: (d)

Sum of the number of clothes dry cleaned by O on Monday and Thursday

= 40 + 115 = 155

The difference between the number of clothes cleaned by N on Monday and Wednesday

= 100 – 35 = 65

Required difference = 155 – 65 = 90 Hence, the answer is option D

Answer: (a)

The pattern of the series is:

1920 ÷ 10 = 192

192 ÷ 8 = 24

24 ÷ 6 = 4

4 ÷ 4 = 1

1 ÷ 2 = 0.5

Answer: (e)

The pattern of the series is as:

100 + 19 × 1 = 119

119 – 19 × 2 = 81

81 + 19 × 3 = 138

138 – 19 × 4 = 62

Answer: (d)

The pattern of the series is in the form of: 

3 + 3² = 12

12 + 5² = 37

37 + 7² = 86

86 + 9² = 167

167 + 11² = 288