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General Intelligence Number Series Number Series Q. #6563 (CAT-I)

Find the missing term in the following alternating sequence: 3, 8, 5, 27, 8, 64, 12, 125, 17, ?

A. 216

B. 361

C. 624

D. 442

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Correct Answer: Option A

• The sequence alternates between two distinct patterns: First series (odd positions): 3, 5, 8, 12, 17 3 + 2 = 5 5 + 3 = 8 8 + 4 = 12 12 + 5 = 17 Second series (even positions): 8, 27, 64, 125, ? 2³ = 8 3³ = 27 4³ = 64 5³ = 125 6³ = 216 • Therefore, the missing term is 216.

General Intelligence Number Series Number Series Q. #6562 (CAT-I)

Find the wrong number in the given series: 3, 6, 7, 9, 11, 14, 15, 18

A. 6

B. 9

C. 14

D. 15

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Correct Answer: Option C

• The series is formed by two alternating sequences: Odd positions: 3, 7, 11, 15 3 + 4 = 7 7 + 4 = 11 11 + 4 = 15 (Correct) Even positions: 6, 9, 14, 18 6 + 3 = 9 9 + 4 = 13 13 + 5 = 18 • Instead of 14, the number should be 13 to follow the +3, +4, +5 pattern. • Therefore, 14 is the wrong number.

General Intelligence Number Series Number Series Q. #6561 (CAT-I)

Find the missing term in the sequence: 7, 17, 37, 77, ?

A. 157

B. 145

C. 154

D. 158

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Correct Answer: Option A

• Pattern logic: Each term is obtained by multiplying the previous term by 2 and adding 3: 7 × 2 + 3 = 14 + 3 = 17 17 × 2 + 3 = 34 + 3 = 37 37 × 2 + 3 = 74 + 3 = 77 77 × 2 + 3 = 154 + 3 = 157 • Thus, the missing number is 157.

General Intelligence Number Series Number Series Q. #6560 (CAT-I)

Find the missing number in the series: 2, 2, 1, 4, 4, 6, 8, 8, ?

A. 12

B. 10

C. 16

D. 20

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Correct Answer: Option C

• The terms form two alternating series: Upper/Odd-positioned series (1st, 3rd, 5th, 7th...): 2, 1, 4, 8 Lower/Even-positioned series (2nd, 4th, 6th, 8th, 9th/target in 3-part steps): Grouping in pairs or alternate streams: Stream 1 (Positions 2, 4, 6, 8): 2 → 4 → 6 → 8 (+2 at each step) Stream 2 (Positions 1, 5, 7, 9): 2 → 4 → 8 → ? (multiplying by 2 each step) 2 × 2 = 4 4 × 2 = 8 8 × 2 = 16 • Hence, the required term is 16.

General Intelligence Number Series Number Series Q. #6559 (CAT-I)

Find the missing number in the following sequence: 36, 34, 30, 28, 24, ?

A. 20

B. 26

C. 22

D. 23

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Correct Answer: Option C

• Pattern logic: The differences alternate between subtracting 2 and subtracting 4: 36 - 2 = 34 34 - 4 = 30 30 - 2 = 28 28 - 4 = 24 24 - 2 = 22 • Therefore, the next number is 22.

General Intelligence Number Series Number Series Q. #6558 (CAT-I)

Find the missing term in the following number series: 1, 2, 2, 4, 3, 8, 7, 10, ?

A. 11

B. 13

C. 9

D. 8

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Correct Answer: Option A

• The sequence contains two intertwined sub-series: Even-positioned terms: 2, 4, 8, 10 (differences are +2, +4, +2...) Odd-positioned terms: 1, 2, 3, 7, ? 1 + 1 = 2 2 + 1 = 3 3 + 4 = 7 7 + 4 = 11 • Hence, the missing term is 11.

General Intelligence Number Series Number Series Q. #6557 (CAT-I)

Find the missing term in the given series: 2, 3, 4, 6, 8, 12, 16, 24, ?

A. 36

B. 30

C. 32

D. 40

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Correct Answer: Option C

• The sequence is composed of two alternate geometric progressions: First series (odd positions): 2, 4, 8, 16, ? 2 × 2 = 4 4 × 2 = 8 8 × 2 = 16 16 × 2 = 32 Second series (even positions): 3, 6, 12, 24 3 × 2 = 6 6 × 2 = 12 12 × 2 = 24 • Therefore, the next term is 32.

General Intelligence Number Series Number Series Q. #6556 (CAT-I)

Find the missing number in the sequence: 7, 12, 22, 42, 82, ?

A. 173

B. 162

C. 183

D. 143

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Correct Answer: Option B

• Pattern logic: Next term = Previous term × 2 - 2 7 × 2 - 2 = 14 - 2 = 12 12 × 2 - 2 = 24 - 2 = 22 22 × 2 - 2 = 44 - 2 = 42 42 × 2 - 2 = 84 - 2 = 82 82 × 2 - 2 = 164 - 2 = 162 • Alternatively, the differences are 5, 10, 20, 40, 80 (doubling each step): 82 + 80 = 162.

General Intelligence Number Series Number Series Q. #6555 (CAT-I)

Find the missing numbers in the given series: 1, 2, 3, 14, 5, 34, 7, ?, ?

A. 68, 7

B. 63, 9

C. 60, 11

D. 62, 9

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Correct Answer: Option D

• The given sequence is formed by combining two interleaved series: First series at odd positions: 1, 3, 5, 7, ? 1 + 2 = 3 3 + 2 = 5 5 + 2 = 7 7 + 2 = 9 • Second series at even positions: 2, 14, 34, ? 2² - 2 = 4 - 2 = 2 4² - 2 = 16 - 2 = 14 6² - 2 = 36 - 2 = 34 8² - 2 = 64 - 2 = 62 • Therefore, the missing numbers are 62 and 9 respectively.

General Intelligence Number Series Number Series Q. #6554 (CAT-I)

Find the missing number in the following series: 12, 8, 14, 6, 16, ?

A. 4

B. 18

C. 32

D. 5

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Correct Answer: Option A

• The given sequence consists of two alternating series: First series: 12 → 14 → 16 (increment of +2) Second series: 8 → 6 → ? (decrement of -2) 8 - 2 = 4 • Thus, the missing number is 4.

General Intelligence Number Series Number Series Q. #6553 (CAT-I)

Find the missing number in the following series: 6, 13, 34, ?, 286, 853

A. 103

B. 97

C. 75

D. 92

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Correct Answer: Option B

• The rule is multiplying the previous term by 3 and subtracting 5: 6 × 3 - 5 = 13 13 × 3 - 5 = 34 34 × 3 - 5 = 102 - 5 = 97 97 × 3 - 5 = 291 - 5 = 286 286 × 3 - 5 = 858 - 5 = 853 • Hence, the missing number is 97.

General Intelligence Number Series Number Series Q. #6552 (CAT-I)

Find the missing number in the sequence: 2, 4, 13, 41, 106, ?

A. 232

B. 172

C. 191

D. 219

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Correct Answer: Option A

• Analyze the successive differences: 4 - 2 = 2 13 - 4 = 9 41 - 13 = 28 106 - 41 = 65 • Second differences: 9 - 2 = 7, 28 - 9 = 19, 65 - 28 = 37 • Third differences: 19 - 7 = 12, 37 - 19 = 18 (increasing by 6) • Next third difference: 18 + 6 = 24 • Next second difference: 37 + 24 = 61 • Next first difference: 65 + 61 = 126 • Missing term = 106 + 126 = 232.

General Intelligence Number Series Number Series Q. #6551 (CAT-I)

Identify the incorrect (wrong) number in the sequence: 232, 343, 454, 564, 676

A. 232

B. 343

C. 454

D. 564

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Correct Answer: Option D

• In all terms except 564, the first (hundreds) and third (units) digits are identical: In 232: hundreds digit = 2, units digit = 2 In 343: hundreds digit = 3, units digit = 3 In 454: hundreds digit = 4, units digit = 4 In 676: hundreds digit = 6, units digit = 6 • For 564, the hundreds digit is 5 and the units digit is 4 (which should be 565). • Hence, 564 is the wrong number.

General Intelligence Number Series Number Series Q. #6550 (CAT-I)

Find the wrong number in the following series: 6, 12, 21, 32, 45, 60

A. 12

B. 21

C. 6

D. 32

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Correct Answer: Option C

• The differences between consecutive terms should form an arithmetic progression with a common difference of 2: 5 + 7 = 12 12 + 9 = 21 21 + 11 = 32 32 + 13 = 45 45 + 15 = 60 • To maintain this series, the first term should be 5 instead of 6. • Therefore, 6 is the wrong number.

General Intelligence Number Series Number Series Q. #6549 (CAT-I)

Find the missing number in the following sequence: 7, 19, 42, 87, ?

A. 138

B. 176

C. 173

D. 216

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Correct Answer: Option B

• The pattern follows multiplying by 2 and adding a decreasing constant: 7 × 2 + 5 = 19 19 × 2 + 4 = 42 42 × 2 + 3 = 87 87 × 2 + 2 = 174 + 2 = 176 • Hence, the correct number is 176.