Replace in each of the following by the correct number:

(a) (b) (c)

(d) (e)

(a) We can calculate the following as follows:

Hence,

28 is the required blank

(b) We can calculate the following as follows:

Hence,

16 is the required blank

(c) We can calculate the following as follows:

Hence,

12 is the required blank

(d) We can calculate the following as follows:

Hence,

20 is the required blank

(e) We can calculate the following as follows:

Hence,

3 is the required blank