# Number Series Questions for SBI Clerk, Railway Group D and Karnataka bank PO 2018 set-5

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

Q.1 141, 147, 171, 231, ?, 561

(A) 316

(B) 350

(C) 325

(D) 368

(E) 351

Q.2 46775, ?, 4725, 675, 135, 45

(A) 51026

(B) 41259

(C) 42525

(D) 49625

(E) None of these

Q.3 128, 64, 32, 24, ?, 30

(A) 24

(B) 30

(C) 16

(D) 28

(E) None of these

Q.4 1219, 652, 463, 400, ?, 372

(A) 340

(B) 375

(C) 396

(D) 350

(E) None of these

Q.5 77, 24, 67, 34, 53, ?, 35, 66

(A) 30

(B) 36

(C) 48

(D) 55

(E) None of these

Explanation:

 Pattern Series 141 141 141 + (23 − 2) 147 147 + (33 − 3) 171 171 + (43 − 4) 231 231 + (53 − 5) 351 (✓) 351 + (63 − 6) 561

Explanation:

 Series Pattern 467775 467775 467775 ÷ 11 42525 (✓) 42525 ÷ 9 4725 4725 ÷ 7 675 675 ÷ 5 135 135 ÷ 3 45

Explanation:

 Pattern Series 128 128 128 × 0.25 64 64 × 0.50 32 32 × .75 24 24 × 1 24 (✓) 24 × 1.25 30

Answer 4. (E) None of these

Explanation:

 Series : 1219 652 463 400 379 372 Pattern : -567 -189 -63 -21 -7 ×3 ×3 ×3 ×3

Explanation:

There are two number series in this question:

I. 77, 67, 53, 35

77 − 10 = 67

67 − 14 = 53

53 − 18 = 35

II. 24, 34, ?, 66

24 + 10 = 34

34 + 14 = 48

48 + 18 = 66