Example
Ex :

Write the successor and predecessor of each of the following numbers:

(i) 1000
(ii) 400099
(iii) One million
Ans:

(i) The successor of 1000 is (1000 + 1) = 1001
The predecessor of 1000 is (1000 – 1) = 999

(ii) The successor of 400099 is (400099 + 1) = 400100.
The predecessor of 400099 is (400099 – 1) = 400098.

(iii) We have,
1 Million = 1000000
∴ Successor of 1 million = 1000000 + 1
= 1000001
Predecessor of 1 million = 1000000 – 1
= 999999