Reasoning Quiz - mini Tea time Snack

Directions (1-2): What should come in place of question mark (?) in the following number series?

Q1. 

15, 19, 83, 119, 631, (?)

(a) 783

(b) 993 

(c) 702

(d) 731

Q2.

 342, 337.5, 328.5, 315, 297, (?)

(a) 365.5 

(b) 360

(c) 270

(d) 274.5

Direction (3-4): In each of these questions, a number series is given. In each series, only one number is wrong number.Find out the wrong number?

Q3.

32, 16, 24, 65, 210, 945, 5197.5

(a) 210

(b) 65

(c) 32

(d)5197.5

Q4. 

6, 91, 584, 2935, 11756, 35277, 70558

(a) 70558

(b) 91

(c) 2935

(d) 584

Q5. Which one of the letters when sequentially placed at the gaps in the given letter series shall complete it?

a__cd__bd__abc__a__dc

(a) c a c b a

(b) b a b c c

(c) b a c d b

(d) b a b a d

Answers:

Q1. 

15, 19, 83, 119, 631, (?)

(a) 783

(b) 993 

(c) 702

(d) 731

Ans.(d)

Sol. The pattern of the series is:

19 – 15 = 4 = 2²

83 – 19 = 64 = 4³

119 – 83 = 36 = 6²

631 – 119 = 512 = 8³

 => 631 + 10² = 631 + 100 = 731

Q2. 342, 337.5, 328.5, 315, 297, (?)

(a) 365.5 

(b) 360

(c) 270

(d) 274.5

Ans.(d)

Q3. 32, 16, 24, 65, 210, 945, 5197.5

(a) 210

(b) 65

(c) 32

(d)5197.5

Ans.(b)

Q4. 6, 91, 584, 2935, 11756, 35277, 70558

(a) 70558

(b) 91

(c) 2935

(d) 584

Ans.(d)

Sol.  The pattern of number series is as follows:

6 × 7 + 7² = 42 + 49 = 91

91 × 6 + 6² = 546 + 36 = 582  [584]

582 × 5 + 5² = 2910 + 25 = 2935

2935 × 4 + 4² = 11740 + 16 = 11756

11756 × 3 + 3² = 35268 + 9 = 35277

Q5. Which one of the letters when sequentially placed at the gaps in the given letter series shall complete it?

a__cd__bd__abc__a__dc

(a) c a c b a

(b) b a b c c

(c) b a c d b

(d) b a b a d

Ans.(c)

Sol. The series is abcd/abdc/abcd/abdc