Question
Complete the number pattern. Fill in the missing number.
1616, 1621, (a)           , 1631, 1636, (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.
1616, 1621, (a)           , 1631, 1636, (b)