Question
Complete the number pattern. Fill in the missing number.
(a)           , 3995, 4001, (b)             , 4013, 4019
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.
(a)           , 3995, 4001, (b)             , 4013, 4019