Correct Answer - Option 5 : 55
Calculation:
Considering the above series,
500, 475, 426, 345, 224, ?
The logic of the series can be explained as,
500 – (5)2 = 475
475 – (7)2 = 426
426 – (9)2 = 345
345 – (11)2 = 224
By observing the pattern, we can write
224 – (13)2 = 55
⇒ ? = 55
∴ The value of ? is 55