23, 27, 43, 79, 143, ?

Select the number from among the given options that can replace the question mark (?) in the following series.
23, 27, 43, 79, 143, ?

Option
a) 240
b) 243
c) 200
d) 250

Solution

23, 27, 43, 79, 143, ?
Difference
4, 16, 36, 64,
2², 4², 6², 8²
Next Should be 10² = 100
for next Number
Add 100 in 143 = 143 + 100 = 243

Correct Answer: b) 243