Length, breadth, height of a box are 4 cm, 12cm and 1m, if density of air is 1.2kg/m3 . The mass of air present in the box is:

100000 — 9899 =  .............?

If 135 = 15, 245 = 40, then 324 = .......... ?

√0.0025  X  √2.25  X  √0.0001  = _ _ _ _ ?

Fill in the blank space

1, 1, 2, 4, 3, 9, 4, 16, 5. .........