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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.

General Intelligence Number Series Number Series Q. #6548 (CAT-I)

Find the missing term in the series: 212, 198, 180, 158, 132, ?

A. 102

B. 121

C. 123

D. 117

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Correct Answer: Option A

• The differences between consecutive terms increase by 4: 212 - 14 = 198 198 - 18 = 180 180 - 22 = 158 158 - 26 = 132 132 - 30 = 102 • Therefore, the next term is 102.

General Intelligence Number Series Number Series Q. #6547 (CAT-I)

Find the missing number in the series: 325, 259, 204, 160, 127, 105, ?

A. 98

B. 96

C. 100

D. 94

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Correct Answer: Option D

• The differences between consecutive terms decrease by 11 at each step: 325 - 66 = 259 259 - 55 = 204 204 - 44 = 160 160 - 33 = 127 127 - 22 = 105 105 - 11 = 94 • Thus, the next number is 94.

General Intelligence Number Series Number Series Q. #6546 (CAT-I)

Find the missing term in the sequence: 5, 16, 51, 158, ?

A. 483

B. 1454

C. 481

D. 1452

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Correct Answer: Option C

• The pattern is multiplying by 3 and adding consecutive odd numbers: 5 × 3 + 1 = 16 16 × 3 + 3 = 51 51 × 3 + 5 = 158 158 × 3 + 7 = 474 + 7 = 481 • Hence, the correct term is 481.

General Intelligence Number Series Number Series Q. #6545 (CAT-I)

Find the missing number in the given series: 0, 5, 60, 615, ?

A. 6030

B. 6170

C. 6130

D. 6000

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Correct Answer: Option B

• The pattern involves adding numbers formed by repeating the digit 5: 0 + 5 = 5 5 + 55 = 60 60 + 555 = 615 615 + 5555 = 6170 • Therefore, the missing number is 6170.

General Intelligence Number Series Number Series Q. #6544 (CAT-I)

Find the missing number in the following series: 2123, 3234, 4345, 5456, ?

A. 6567

B. 6467

C. 6556

D. 6566

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Correct Answer: Option A

• The pattern follows an addition of 1111 to each successive term: 2123 + 1111 = 3234 3234 + 1111 = 4345 4345 + 1111 = 5456 5456 + 1111 = 6567 • Alternatively, looking at the individual digits of each term: 2-1-2-3, 3-2-3-4, 4-3-4-5, 5-4-5-6, the next set is 6-5-6-7, giving 6567.

General Intelligence Number Series Number Series Q. #6543 (CAT-I)

Find the odd/wrong number in the given number series: 28, 44, 68, 80, 92

A. 28

B. 44

C. 68

D. 80

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Correct Answer: Option D

Each term is a multiple of 4 with a prime factor: 28 = 4 × 7 44 = 4 × 11 68 = 4 × 17 80 = 4 × 20 (20 is not a prime number) 92 = 4 × 23 • The numbers multiplied by 4 are consecutive primes (7, 11, 17, 19 would give 76, 23). Since 20 is composite, 80 is the wrong/inconsistent term.

General Intelligence Number Series Number Series Q. #6542 (CAT-I)

Find the wrong number in the given series: 216, 163, 120, 72, 24

A. 216

B. 163

C. 72

D. 24

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Correct Answer: Option B

The pattern has a constant common difference of -48: 216 - 48 = 168 (given as 163) 168 - 48 = 120 120 - 48 = 72 72 - 48 = 24 • Thus, 163 is the wrong number.