AMU MCA Number Series Previous Year Questions (PYQs)
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Showing 6 questions
Choose the correct alternative that will constitute the same pattern:
98, 90, 82, 74, __, 58
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2
3
4
Solution
Pattern: subtract 8 each time
98 − 8 = 90
90 − 8 = 82
82 − 8 = 74
74 − 8 = 66
66 − 8 = 58
Find the next number in the series:
2, 9, 28, 65, __
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2
3
4
Solution
Solution:
2 = 1³ + 1
9 = 2³ + 1
28 = 3³ + 1
65 = 4³ + 1
Next = 5³ + 1 = 125 + 1 = 126
Choose the correct alternative:
7, 15, 32, __, 138, 281
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2
3
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Solution
Pattern: ×2 + increasing numbers
7 × 2 + 1 = 15
15 × 2 + 2 = 32
32 × 2 + 3 = 67
67 × 2 + 4 = 138
138 × 2 + 5 = 281
The missing number in the series 40, 120,60, 180, 90,. lsis:
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Solution
Pattern: ×3, ÷2 alternately
40 × 3 = 120
120 ÷ 2 = 60
60 × 3 = 180
180 ÷ 2 = 90
90 × 3 = 270
270 ÷ 2 = 135
Find the missing sequence:
25, 49, 121, 169, _____
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Solution
Squares of prime numbers:
$5^2 = 25$
$7^2 = 49$
$11^2 = 121$
$13^2 = 169$
Next prime = 17
$17^2 = 289$
Find the missing sequence
1, 1, 2, 3, ____, 8, 13
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2
3
4
Solution
This is Fibonacci sequence
1, 1, 2, 3, 5, 8, 13
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