Q66: 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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Q57: Find the missing number in the series:
2, 3, 5, 7, 11, ?
Answer: A
Prime numbers: Next is 13.
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Q17: Find the missing number in the series:
10, 7, 4, 1, ?
Answer: A
Each term decreases by 3. Next: 1 - 3 = -2.
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Q18: Find the missing number in the series:
100, 96, 89, 79, ?
Answer: B
Differences: -4, -7, -10... Pattern is -3 more each step → next -13: 79-13=66.
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Q19: Find the missing number in the series:
10, 7, 4, 1, ?
Answer: C
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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Q97: Find the missing number in the series:
1, 4, 9, 16, 25, ?
Answer: A
These are squares of natural numbers: 1², 2², 3²... next is 6² = 36.
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Q146: Find the missing number in the series:
2, 3, 5, 7, 11, ?
Answer: B
Prime numbers: Next is 13.
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Q65: Find the missing number in the series:
2, 3, 5, 7, 11, ?
Answer: A
Prime numbers: Next is 13.
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Q59: Find the missing number in the series:
100, 96, 89, 79, ?
Answer: C
Differences: -4, -7, -10... Pattern is -3 more each step → next -13: 79-13=66.
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