Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series.
728, 717, 695, 662, 618, ?
Option 1: 564
Option 2: 561
Option 3: 563
Option 4: 562
Correct Answer: 563
Solution :
Given:
728, 717, 695, 662, 618, ?
Subtract consecutive multiples of 11 from the previous number to get the next number –
728 – 11 = 717; 717 – 22 = 695; 695 – 33 = 662; 662 – 44 = 618; 618 – 55 = 563
So, the missing number is 563. Hence, the third option is correct.
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