MAH CET MCA Number Series Previous Year Questions (PYQs) – Page 1 of 2
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Showing 15 questions
Find the next term: 2, 4, 7, 14, 17, 34, ____
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Solution
Pattern alternates between ×2 and +3 →
2×2=4, 4+3=7, 7×2=14, 14+3=17, 17×2=34, 34+3=37
Complete the series: 840, 168, 42, 14, 7, ?
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Solution
Each term is divided by the next integer:
$840 ÷ 5 = 168$, $168 ÷ 4 = 42$, $42 ÷ 3 = 14$, $14 ÷ 2 = 7$, $7 ÷ 1 = 7$.
If the pattern is 6, 10, 16, 24, what is the next number?
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Solution
In the series given below, a wrong number is given. Find out the number:
1, 2, 3, 5, 12, 15, 48, 53, 212, 217, 1090
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Solution
Find the value of 1, 4, 9, 16, ___
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Solution
Given sequence $1, 4, 9, 16, \dots$ are perfect squares.
Next term $= 5^2 = 25$.
Find the wrong number in the given series:
$4,\ 5,\ 13,\ 39,\ 160,\ 805,\ \ldots$
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Solution
Pattern: $n_{k+1} = n_k \times k + 1$
$4 \times 1 + 1 = 5$
$5 \times 2 + 1 = 11$ (not 13 → wrong term).
What will be the next term in the series?
12, 24, 14, 28, 18, 36, __
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Solution
Pattern alternates between doubling and adding 2, 4, 6…
Next term $= 26$.
Find the wrong one:
12,24,47,93,187,373,747
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Solution
Pattern $= (n \times 2) - 1$.
$12 \times 2 - 1 = 23$, not 24 → wrong term.
Find the next term: $20,\ 32,\ 45,\ 59,\ 74,\ \ldots$
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Solution
Differences = 12, 13, 14, 15 → next +16
$74 + 16 = 90$.
$210, 195, 175, 150, 120,\ ?$
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Solution
Pattern of differences: $-15, -20, -25, -30$.
Next difference = $-35$.
So, $120 - 35 = 85$.
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