The difference of successor and predecessor of 10000 is
(a) 1
(b) 2
(c) 9,99
(d) 990
Successor of 10000 = 10000 + 1
=10001
Predecessor of 10,000 = 10,000 - 1
=9,999
Difference between successor and predecessor of 10,000 = 10001 - 9,999
=2
Find the sum and difference of successor and predecessor of 999.