Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series.
10, 15, 19, 22, ?, 25
Option 1: 24
Option 2: 20
Option 3: 27
Option 4: 23
Correct Answer: 24
Solution :
Given:
10, 15, 19, 22, ?, 25
In the above-given series, add consecutive natural numbers in descending order to the previous number to get the next number.
10 + 5 = 15; 15 + 4 = 19; 19 + 3 = 22; 22 + 2 = 24; 24 + 1 = 25
So, 24 is the missing number of the series. Hence, the first option is correct.
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