Question
Complete the number pattern.

20, 50, 350, 380, 680, 710, 1010, (a)        , (b)        , 1370
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.

20, 50, 350, 380, 680, 710, 1010, (a)        , (b)        , 1370