# Set-8 Number Series (Missing/Wrong Number) For SBI PO and SBI Clerk 2019 | Must Go Through These Questions Dear Aspirants,
We are providing the most important Number Series (Missing/Wrong Number) Questions for SBI PO 2019, SBI Clerk 2019 and all other competitive bank and insurance exams. These questions have very high chances to be asked in SBI PO 2019, SBI Clerk 2019.
Get the Best Test Series for SBI PO 2019 at the most affordable price (Based on Real Exam Pattern) – Click Here
Download the Best GK Gaming App for Current Affairs and GK (Bank+SSC)– Click here (App No 1)  (App No 2)

Directions:(1-10) What should come in place of the question mark (?) in the following number series?

1. 240, 120, 80, 60, 48, ?

2. 5, 17, 43, 89, ?, 265

3. 8, ?, 52, 210, 1048, 6290

4. 64, 62, 65, 60, 67, 56, ?

5. 15.21, 16.81, 18.49, 20.25, ?

6. 106, 155, 276, 501, 537, 762, ?

7. 17, 23, 33, 48, 69, ?

8. 17, 33, 65, 129, 257, ?

9. 17, 16, 28, 75, ?

10. 2, 4, 16, 52, 132, ?, 534

• Directions:(1-10) What should come in place of the question mark (?) in the following number series?

##### 1. Question

240, 120, 80, 60, 48, ?

Ans:5
The pattern is:240×1/2 = 120, 120×2/3 = 80, 80×3/4 = 60, 60×4/5 = 48, 48×5/6 = 40
• ##### 2. Question

5, 17, 43, 89, ?, 265

Ans:4
The pattern is:22 + 13 = 5, 32 + 23 = 17, 42 + 33 = 43, 52 + 43 = 89, 62 + 53 = 161, 72 + 63 = 265
• ##### 3. Question

8, ?, 52, 210, 1048, 6290

Ans:3
The pattern is:8×2+2=18, 18×3-2=52, 52×4+2=210, 210×5-2=1048, 1048×6+2=6290
• ##### 4. Question

64, 62, 65, 60, 67, 56, ?

Ans:3
The pattern is:64-2=62, 62+3=65, 65-5=60, 60+7=67, 67-11=56, 56+13=69(The consecutive differences are prime numbers, added and subtracted alternately)

• ##### 5. Question

15.21, 16.81, 18.49, 20.25, ?

Ans:
The pattern is (3.9)2, (4.1)2, (4.3)2, (4.5)2, (4.7)2
• ##### 6. Question

106, 155, 276, 501, 537, 762, ?

Ans:4
106 + (1 + 0 + 6)2 = 155155 + (1 + 5 + 5)2 = 276276 + (2 + 7 + 6)2 = 501

501 + (5 + 0 + 1)2 = 537

537 + (5 + 3 + 7)2 = 762

762 + (7 + 6 + 2)2 = 987

So the answer is 4.

• ##### 7. Question

17, 23, 33, 48, 69, ?

Ans:4
17+1+2+3=2323+1+2+3+4=3333+1+2+3+4+5=48

48+1+2+3+4+5+6=69

69+1+2+3+4+5+6+7=97

• ##### 8. Question

17, 33, 65, 129, 257, ?

Ans:1
17 = 24 + 133 = 25 + 165 = 26 + 1

129 = 27 + 1

257 = 28 + 1

So the next term is 513 = 29 + 1

• ##### 9. Question

17, 16, 28, 75, ?

Ans:4
17 x 1 – 12 = 1616 x 2 – 22 = 2828 x 3 – 32 = 75

75 x 4 – 42 = 284

• ##### 10. Question

2, 4, 16, 52, 132, ?, 534

Ans:4
The pattern is2+12+13=4, 4+22+23=16, 16+32+33=52, 52+42+43=132, 132+52+53=282, 282+62+63=534 #### About Study Virus

View all posts by Study Virus →