Question

The product of the successor of 999 and the predecessor of 1001 is
(a) one lakh (b) one billion (c) one million (d) one crore

Answer 1

Successor of 999 = 999 + 1 = 1000
Predecessor of 1001 = 1001 − 1 = 1000
Now
Product = (Successor of 999) $\text{×}$ (Predecessor of 1001)
= 1000 $\text{×}$ 1000
= 1000000
= one million
Hence, the correct option is (c).