Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series. 28, 27, 31, 22, 38, 13, 49, ?
Option 1: 42
Option 2: 2
Option 3: 0
Option 4: 22
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Correct Answer: 0
Solution : Given: 28, 27, 31, 22, 38, 13, 49, ?
Subtract and add alternately the square of consecutive natural numbers – 28 – (1)2 = 28 – 1 = 27 27 + (2)2 = 27 + 4 = 31 31 – (3)2 = 31 – 9 = 22 22 + (4)2 = 22 + 16 = 38 38 – (5)2 = 38 – 25 = 13 13 + (6)2 = 13 + 36 = 49 49 – (7)2 = 49 – 49 = 0
So, 0 is the missing number of the series. Hence, the third option is correct.
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Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series. 16, 32, 14, 19, 37, 21, 22, 42, ?, 25, 47, 35
Option 1: 34
Option 2: 26
Option 3: 32
Option 4: 28
Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 63, 56, 49, 42, 35, 28, ?
Option 1: 14
Option 2: 21
Option 3: 22
Option 4: 35
Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series. 21, 23, 20, 22, 19, 21, ?
Option 1: 17
Option 2: 18
Option 3: 23
Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series. 13, 39, 156, 780, ?
Option 1: 4460
Option 2: 4580
Option 3: 4680
Option 4: 4660
Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 57, 54, 52, 49, 47, 44, 42, ?
Option 1: 40
Option 2: 27
Option 3: 39
Option 4: 47
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