Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 25, 15, ?, −5, −15
Option 1: 20
Option 2: 5
Option 3: 10
Option 4: -1
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Correct Answer: 5
Solution : Given: 25, 15, ?, −5, −15
Subtract 10 from the previous term to obtain the next term in the given series − 25 − 10 = 15; 15 − 10 = 5, 5 − 10 = −5, −5 − 10 = −15
So, 5 is the missing term in the series. Hence, the second option is correct.
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Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 11, ?, 20, 29, 41, 56
Option 1: 16
Option 2: 13
Option 3: 15
Option 4: 14
Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 15, ?, 27, 39, 55, 75
Option 1: 19
Option 2: 20
Option 3: 21
Option 4: 18
Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? $\frac{1}{2}, \frac{3}{4}, ?, \frac{5}{4}$
Option 1: 1
Option 2: $\frac{1}{4}$
Option 3: $\frac{3}{4}$
Option 4: $\frac{2}{3}$
Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 2, 6, ?, 54, 162, 486
Option 3: 18
Option 4: 2
Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? ?, 11, 35, 107, 323
Option 1: 4
Option 3: 8
Option 4: 3
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