A. 30
B. 70
C. 45
D. None of these
4, 9, 20, 43, 90, .
f(6, 4) equals to
1W 2V 3U 5T ? 13R
HV GT FR EP DN ?
I M Q ?
258 130 66 ? 18 10
2 3 4 6 8 ? 16 24
D F I M R ?
2 4 8 14 22 ?
Complete the following series.1, 1, 4, 12, 27, 51, .