# Quantitative Aptitude Number Series Practice Questions – Set 14

Quantitative Aptitude Number Series Practice Questions – Set 14
Directions (1 – 2): Find the wrong term in the following number series?
1. 10, 14, 28, 32, 64, 68, 132
a) 28
b) 32
c) 64
d) 132
e) None of these
2. 10           15           24          35          54          75          100
a) 75
b) 35
c) 24
d) 15
e) 54
Directions (3 – 15): What should come in place of question mark (?) in the following question?
3. 3         7          14        23         ?        49
a) 47
b) 36
c) 24
d) 41
e) 44
4. 123, 126, 124, 127, ?, 128, 126, 129
a) 127
b) 125
c) 126
d) 128
e) None of these
5. 41, 328, 5248, ?, 10747904
a) 102444
b) 5431552
c) 167936
d) 127688
e) None of these
6. 226, 222, 206, 170, 106, ?
a) 84
b) 100
c) 78
d) 6
e) 36
7. 117         389         525         593         627         (?)
a) 624
b) 644
c) 634
d) 654
e) 664
8. 3, 23, 43, ?, 83, 103
a) 33
b) 53
c) 63
d) 73
e) None of these
9. 4, 19, 49, 94, 154, ?
a) 223
b) 225
c) 229
d) 239
e) None of these
10. 10        17        48        165      688      3475    ?
a) 19892
b) 19982
c) 21892
d) 20892
e) None of these
11. 7              8              16           43           107            (?)
a) 186
b) 196
c) 194
d) 232
e) None of these
12. 4   13       17       ?          30       39
a) 29
b) 21
c) 26
d) 19
e) None of these
13. 0, 2, 6, 12, 20, 30, 42, ?
a) 56
b) 62
c) 49
d) 55
e) 58
14. 11, 12, 26, 81, ?
a) 324
b) 328
c) 320
d) 280
e) None of these
15. 5, 11, 23, 47, ?
a) 95
b) 93
c) 96
d) 97
e) None of these

Solutions:
1. D) The pattern of the given number series is as:
→10,
→10 + 4 = 14,
→14 × 2 = 28,
→28 + 4 = 32,
→ 32 × 2 = 64,
→ 64 + 4 = 68
→ 68 × 2 = 136, (instead of 132)
Hence, the wrong term of the given number series is 132. The correct term is 136.

2. B) 10 + 5 = 15 (By adding 5)
15 + 9 = 24 (By adding 5 + 4 =9)
24 + 13 = 37(By adding 9 + 4 =13)
37 + 17 = 54 (By adding 13 + 4 =17)
54 + 21 = 75 (By adding 17 + 4 =21)
75 + 25 = 100 (By adding 21 + 4 =25)
Hence, the wrong number = 35

3. B) The pattern of given series is as –
12 + 2 = 3
22 + 3 = 7
32 + 5 = 14
42 + 7 = 23
52 + 11 = 36
62 + 13 = 49
Hence required term is 36.

4. B) We observe that
123 + 3 = 126 and 126 – 2 = 124
124 + 3 = 127
128 – 2 = 126 and 126 + 3 = 129
So, the series is a pattern of +3, -2, +3, -2
Hence, the next term in the series is: 127 – 2 = 125

5. C) 41× 8 = 328
328 × 16 = 5248
5248 × 32 = 167936
167936 × 64 = 10747904
So, the missing number is: 167936

6. D) The pattern of the given number series is:
226 22 = 222
222 4= 206
206 62 = 170
170 82 = 106
106 102 = 6

7. B) The pattern of given series is –
389 – 117 = 272
525 – 389 =136
593 – 525 = 68
627 – 593 = 34
? – 627 = 17
? = 627 + 17 = 644

8. C) Let the missing number be x, then
23 – 3 = 20
43 – 23 = 20
X – 43 = 20 x = 63
83 – 63 = 20
103 – 83 = 20

9. C) 4 + 15 = 19
19 + 30 = 49
49 + 45 = 94
94 + 60 = 154
154 + 75 = 229

10. D) 17 = 10 × 1 + 7 × 1
48 = 17 × 2 + 7 × 2
165 = 48 × 3 + 7 × 3
688 = 165 × 4 + 7 × 4
3475 = 688 × 5 + 7 × 5
20892 = 3475 × 6 + 7 × 6

11. D) The pattern may be evaluated as:
→ 7
→ 7 + 13 = 8
→ 8 + 23 = 16
→ 16 + 33 = 43
→ 43 + 43 = 107
Hence next number must be,
→ 107 + 5= 232
The required term in the given number series is 232.

12. C) The pattern can be analyzed as:
→ 13 – 4 = 9 = 32
→ 17 – 13 = 4 = 22
Similar pattern is followed from the end side i.e.
→ 39 – 30 = 9 = 32
Hence next number must be:
→ 30 – 22 = 26
The required term in the given number series is 26.

13. A) Difference between two numbers is in multiplication of 2.
2 – 0 = 2
6 – 2 = 4
12 – 6 = 6
20 – 12 = 8
30 – 20 = 10
42 – 30 = 12
So the next difference should be 14
Next number = 42 + 14 = 56

14. B) The pattern of given series is as follows:
→ 11
→ 11 × 1 + 1 = 12
→ 12 × 2 + 2 = 26
→ 26 × 3 + 3 = 81
The next number
→ 81 × 4 + 4 = 328
Hence the required term of given sequence is 328.

15. A) The pattern of given sequence can be evaluated as:
→ 5
→ 5 × 2 + 1 = 11
→ 11 × 2 + 1 = 23
→ 23 × 2 + 1 = 47
Hence, the next number must be
→ 47 × 2 + 1 = 95
Hence the required term of given number is 95.