Q121: Find the missing number in the series:
100, 96, 89, 79, ?
Answer: A
Differences: -4, -7, -10... Pattern is -3 more each step → next -13: 79-13=66.
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Q122: Find the missing number in the series:
2, 4, 6, 8, ?
Answer: B
Simple arithmetic progression: +2 each time. So next is 10.
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Q123: Find the missing number in the series:
1, 8, 27, 64, ?
Answer: C
Cubes of 1, 2, 3, 4 → next is 5³ = 125.
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Q124: Find the missing number in the series:
100, 96, 89, 79, ?
Answer: D
Differences: -4, -7, -10... Pattern is -3 more each step → next -13: 79-13=66.
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Q125: Find the missing number in the series:
121, 144, 169, ?
Answer: A
These are squares of 11, 12, 13... next: 14² = 196.
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Q126: Find the missing number in the series:
2, 3, 5, 7, 11, ?
Answer: B
Prime numbers: Next is 13.
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Q127: Find the missing number in the series:
1, 4, 9, 16, 25, ?
Answer: C
These are squares of natural numbers: 1², 2², 3²... next is 6² = 36.
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Q132: Find the missing number in the series:
10, 7, 4, 1, ?
Answer: D
Each term decreases by 3. Next: 1 - 3 = -2.
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Q129: Find the missing number in the series:
2, 4, 6, 8, ?
Answer: A
Simple arithmetic progression: +2 each time. So next is 10.
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Q130: Find the missing number in the series:
121, 144, 169, ?
Answer: B
These are squares of 11, 12, 13... next: 14² = 196.
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