AAO Exam-CT 2: Quant (Number Series)
AAO Exam-CT 2- Quant (Number Series)
1. What should come in place of the question mark '?' in the following number series? 126, 147, 168, ?, 210, 231
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178
-
196
-
190
-
175
Calculation∶
The series follows following pattern
147 - 126 = 21
168 - 147 = 21
189 - 168 = 21
210 - 189 = 21
231 - 210 = 21 ∴ The value of ? is 189
2. What should come in place of the question mark '?' in the following number series? 17, 90, 273, 274, -275, 822, ?
-
3125
-
-3125
-
4115
-
-4225
Calculation∶
The series follows following pattern
17 × 5 + 5 = 90
90 × 3 + 3 = 273
273 × 1 + 1 = 274
274 × (-1) - 1 = -275
-275 × (-3) - 3 = 822
822 × (-5) - 5 = -4115 ∴ The value of ? is -4115
3. What should come in place of the question mark '?' in the following number series? 3, -2, 6, -15, ?, -315
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62
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63
-
65
-
60
Calculation∶
The series follows following pattern
⇒ 3 × (-1) + 1 = -2
⇒ -2 × (-2) + 2 = 6
⇒ 6 × (-3) + 3 = -15
⇒ -15 × (-4) + 4 = 64
⇒ 64 × (-5) + 5 = -315
∴ The value of ? is 64
4. What should come in place of the question mark '?' in the following number series? 3, 7, 15, ?, 43, 63
-
32
-
25
-
36
-
21
Calculation∶
The series follows following pattern
3 + (1 × 4) = 7
7 + (2 × 4) = 15
15 + (3 × 4) = 27
27 + (4 × 4) = 43
43 + (5 × 4) = 63
∴ The value of ? is 27
5. What should come in place of the question mark ‘?’ in the following number series?
17, 19, 40, 122, ?, 2452
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500
-
530
-
570
-
None of these
Calculation:
The series follows the following pattern
17 × 1 + 2 = 19
19 × 2 + 2 = 40
40 × 3 + 2 = 122
122 × 4 + 2 = 490
490 × 5 + 2 = 2452
∴ The missing number is 490.
6. In each of the following number series, the wrong number is given, find out that number.
3, 7, 22, 70, 206, 537
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3
-
7
-
206
-
537
The series follows the following pattern
3
⇒ 3 + 13 + 3 = 7
⇒ 7 + 23 + 7 = 22
⇒ 22 + 33 + 22 = 71
⇒ 71 + 43 + 71 = 206
⇒ 206 + 53 + 206 = 537
∴ the wrong number in the series is 70
7. In each of the following number series, the wrong number is given, find out that number.
22, 21, 41, 128, 513, 2564
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128
-
513
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2564
-
21
The series follows the following pattern:
22 × 1 - 1 = 21
21 × 2 + 1 = 43
43 × 3 - 1 = 128
128 × 4 + 1 = 513
513 × 5 - 1 = 2564
∴ The wrong term in the series is 41.
8. In each of the following number series, the wrong number is given, find out that number.
1440, 240, 48, 16, 4, 2
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240
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2
-
4
-
48
The series follows the following pattern:
1440 ÷ 6 = 240
240 ÷ 5 = 48
48 ÷ 4 = 12
12 ÷ 3 = 4
4 ÷ 2 = 2
∴ The wrong term in the series is 16.
9. In each of the following number series, the wrong number is given, find out that number.
35, 50, 63, 80, 99, 122
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63
-
122
-
99
-
50
The series follows the following pattern:
62 – 1 = 35
72 + 1 = 50
82 – 1 = 63
92 + 1 = 82
102 – 1 = 99
112 + 1 = 122
∴ The wrong term in the series is 80.
10. In each of the following number series, a wrong number is given. Find out that number.
24, 47, 45, 91, 90, 179
-
91
-
47
-
179
-
90
The series follows the following pattern:
24 × 2 - 1 = 47
47 × 1 - 1 = 46
46 × 2 - 1 = 91
91 × 1 - 1 = 90
90 × 2 - 1 = 179
∴ The wrong term in the series is 45.
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