1.  Choose the best alternative.
68 : 130 : : ? : 350

A. 210
B. 216
C. 222
D. 240

Answer: Option C

Explanation:

Clearly, 68 = 4³ + 4; 130 = 5³ + 5; 350 = 7³ + 7. So, missing number = 6³ + 6 = 216 + 6 = 222.