Magic of Nine
Multiply any number with 9, 99, 999,………….…
999×384=383616
(second number -1)(subtract 9 from
each of these new digits)ie.( 384 -1) and (9-3)(9-8)(9-3)
999 x 454 = 453546
999 x 657 = 656343
9999 x 878 = 8779122
9999 x 658 =6579342
99999 x 548 = 54799452
999 x 999 = 998001
9999 x 1001 = 10008999