SALL: gottt it 1 1x1 = 2 2x3 = 6 6x4 = 24 24x5 = 120 120x6 = 480 480x7 = 3360 ......................... rite
ZEESHANAHMED: 0 1 3 6 10 15 ... its very easy Sall is liye f16 ko karnay dain solve.
ZEESHANAHMED: Exactly! , now proceed it...