Question
Complete the number pattern.

30, 40, 140, 150, 250, 260, 360, (a)       , 470, (b)       
2 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

Complete the number pattern.

30, 40, 140, 150, 250, 260, 360, (a)       , 470, (b)