Jawapan

2016-10-04T22:13:07+08:00
  • Yaqi
  • Tangan Bantuan
2016-10-04T22:29:49+08:00
Stage 1 = 1 ball
stage 2 = 4 ball
stage 3 = 9 ball
stage 4 = X ball
1→4→9→X =1 , (1+3) , (4+5) , (9+7)
=1 , 4 , 9 , 16
x = 16