Question
Complete the number pattern. Fill in the missing number.
2228, 2231, (a)           , 2237, 2240, (b)           
1 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. Fill in the missing number.
2228, 2231, (a)           , 2237, 2240, (b)