## Series Based Questions for IBM Placement Test 1

• 03:19
• Tutorial Diary brings you important questions for IBM placement preparation and Interview Preparation. In this part you will find questions which are based on Series Completion important for IBM placements and interviews. These question will help you practice, learn and improve your skills so that you can perform well in IBM placement and Interviews.

Question: A term in the below given number series is wrong. Find out that wrong term in the given series:

93, 309, 434, 498, 521, 533

(a) 309
(b) 434
(c) 498
(d) 521
Solution: 93 + 6^3 = 309
309 + 5^3 = 434
434 + 4^3 = 498
498 + 3^3 = 525 (not 521)
525 + 2^3 = 533

### 5824, 5242, ?, 4247, 3823 (a) 4467 (b) 4718 (c) 4856 (d) 5164

Solution:
The series goes like this
5824, 5824 - 582 = 5242, 5242 - 524 = 4718, 4718 - 471 = 4247, 4247 - 424 = 3823
Question: Find next element to the series:

### (a) 76 (b) 90 (c) 96 (d) 98

Solution:
48/2= 24
24×4=96
96/2=48
48×4=192
192/2=96
Question: Replace ? with correct option:
90, 180, 12, 50, 100, 200, ?, 3, 50, 4, 25, 2, 6, 30, 3

### (a) 150 (b) 175 (c) 225 (d) 250

Solution:
90, 180, 12, 50, 100, 200, ?,
and 3, 50, 4, 25, 2, 6, 30, 3
3*50=150
50*4=200
4*25=100
25*2=100
2*6=12
6*30=180
30*3=90
so ans is
A. 150
Question: Find the next term in the given series:

### 9, 27, 31, 155, 161, 1127, ? (a) 316 (b) 1135 (c) 1288 (d) 2254

Solution:
9*3=27, 27+4=31
31*5=155, 155+6=161
161*7=1127, 1127+8=1135
first , the term will be multiplied by 3 and the next odd no's and so on then the multiplied term will be added with the even terms starting with 4 and then so on.
ans: 1135

### (a) 92 (b) 112 (c) 136 (d) 144

Solution:
198-2*2=194
194-3*3=185
185-4*4=169
169-5*5=144
Difference of consecutive terms increases in terms of squares