Number Series Questions for SBI Clerk, Railway Group D and IDBI Executive 2018 set-6

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Direction (Q.1-5): What will come in place of the question mark (?) in the following number series?

Q.1 18, 8, 6, 8, ?, 176

(A) 36

(B) 50

(C) 24

(D) 64

(E) None of these

 

Q.2 594, ?, 374, 286, 210, 144

(A) 495

(B) 476

(C) 425

(D) 465

(E) 415

 

Q.3 212.625, 141.75, 94.5, 63, ?, 28

(A) 42

(B) 50

(C) 26

(D) 32

(E) None of these

 

Q.4 51, 53, 63, 89, 139, ?

(A) 240

(B) 275

(C) 296

(D) 265

(E) None of these

 

Q.5 22, 15, 29, 8, 36, ?

(A) 54

(B) 10

(C) 1

(D) 5

(E) 25

 

Answer 1. (C) 24

Explanation:

[su_table responsive=”yes” class=”code”]

Pattern Series
18 18
18 × 0.50 – 1 8
8 × 1 – 2 6
6 × 2 – 4 8
8 × 4 – 8  24 (✓)
24 × 8 – 16 176

[/su_table]

Answer 2. (B) 476

Explanation:

[su_table responsive=”yes” class=”code”]

Series : 594 476 374 286 210 144
Pattern : -118 -102 -88 -21 -7
+16 +14 +12 +10

[/su_table]

Answer 3. (A) 42

Explanation:

[su_table responsive=”yes” class=”code”]

Pattern Series
212.625 212.625
212.625 ÷ 1.5 141.75
141.75 ÷ 1.5 94.5
94.5 ÷ 1.5 63
63 ÷ 1.5  42 (✓)
42 ÷ 1.5 28

[/su_table]

Answer 4. (E) None of these

Explanation:

[su_table responsive=”yes” class=”code”]

Pattern Series
51 51
51 + (12 + 1) 53
53 + (32 + 1) 63
63 + (52 + 1) 89
89 + (72 + 1)  139
139 + (92 + 1)  221 (✓)

[/su_table]

Answer 5. (C) 1

Explanation:

[su_table responsive=”yes” class=”code”]

Pattern  Series
22 22
22 – 7 15
15 + 14 29
29 – 21 8
8 + 28  36
36 – 35 1 (✓)

[/su_table]

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