Odd Man Out and Series

Find out the missing Number 1: 8, 16, 32, 64, 128, ___ a. 252 b. 456 c. 256 d. 552 Answer: Option C Explanation: : Each preceding number is multiplied by 2 8 × 2 = 16, 16 × 2 = 32, 32 × 2 = 64, 64 × 2 = 128, 128× 2 = 256 Hence, the missing number is 256 Pick out the ODD Number 2: 9, 16, 25, 36, 125, 169, 196 a. 36 b. 196 c. 125 d. 169 Answer: Option C Explanation: : All numbers except 125 are perfect squares. 53 = 125 Hence, the odd number is 125 Pick out the Wrong One 3: 6,7, 9, 12, 14, 15, 25,28 a. 9 b. 7 c. 14 d. 25 Answer: Option B Explanation: : Each number is composite except 7 Hence, the odd number is 7 Pick out the Wrong One 4: 6, 12, 20, 30, 42, 52, 72, 90 a. 20 b. 52 c. 65 d. 90 Answer: Option B Explanation: : 2 × 3 = 6, 3 × 4 = 12, 4 × 5 = 20, 5 × 6 = 30, 6 × 7 = 42, 7 × 8 = 56, 8 × 9 = 72 The numbers in the series are in order as shown above. After 42, the next number in series should be 56 instead of 54. Hence, the odd number is 54 5: pick out the wrong number in the given sequence of numbers. 582, 605, 588, 611, 634, 617, 600 A) 634 B) 611 C) 605 D) 600 Answer: Option B Explanation: : Alternatively 23 is added and 17 is subtracted from the terms. So, 634 is wrong. Hance Answer is 634

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