What should come in place of the question mark (?) in the following number series
8 9 20 63 256 1285 ?
8(×1+1)9(×2+2)20(×3+3)63(×4+4)256(×5+5)1285(×6+6)7716
980 484 236 112 50 ? 3.5
Directions (next six questions) : What should come in place of the question mark(?) in the following questions
(15.5% of 1245) - (12.5% of 1458) = ?
?%of 658+40%of 845 = 568.3
1728÷3√262144×?-288=4491
(0.05×6.25)÷2.5=?