Question : Directions: In the following question, a series is given with one number missing. Select the missing number from the given alternatives. 1, 4, 3, 16, 6, 36, 10, 64, 15, 100, ?
Option 1: 21
Option 2: 19
Option 3: 22
Option 4: 25
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Correct Answer: 21
Solution : Given: 1, 4, 3, 16, 6, 36, 10, 64, 15, 100, ?
In the given series, we have two subseries – (I) 1, 3, 6, 10, 15, ? (II) 4, 16, 36, 64, 100 In the first subseries add consecutive natural numbers starting from 2, to get the next number – 1 + 2 = 3; 3 + 3 = 6; 6 + 4 = 10; 10 + 5 = 15; 15 + 6 = 21 The second subseries is the square of consecutive even numbers starting from 2 – (22)→4; (42)→16; (62)→36; (82)→64; (102)→100
Therefore, the required missing number in the series is 21. Hence, the first option is correct.
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Question : Directions: In the following question, a series is given with one number missing. Select the missing number from the given alternatives. 16, 17, 25, 52, 116, ?
Option 1: 225
Option 2: 219
Option 3: 241
Option 4: 263
Question : Directions: In the following question, a series is given with one number missing. Select the missing number from the given alternatives. 3, 7, 16, 35, ?
Option 1: 65
Option 2: 72
Option 3: 74
Option 4: 76
Question : Directions: In the following question, a series is given with one number missing. Select the missing number from the given alternatives. 11, 8, 4, –1, ?
Option 1: –5
Option 2: 5
Option 3: –6
Option 4: –7
Question : Directions: In the following question, a series is given with one number missing. Select the missing number from the given alternatives. 1, 25, ?, 361, 841, 1681
Option 1: 169
Option 2: 225
Option 3: 161
Option 4: 121
Question : Directions: Study the given pattern carefully and find the missing number. (1, 1, 1, –1), (2, 4, 8, 2), (________, 36, 216, 174)
Option 1: 6
Option 2: 24
Option 3: 18
Option 4: 22
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