Question

Which of the following is incorrect about predecessors.

• A. Predecessor of 1 lakh is 99999.
• B. Predecessor of a 2 digit number is always a 2 digit number.
• C. 98 is the predecessor of 99.
• D. The whole number 0 has no predecessor .

Answer 1

The correct option is B Predecessor of a 2 digit number is always a 2 digit number.

$\left(i\right)$ 99999 comes just before 100000 (1 lakh).
So, 99999 is the predecessor of 1 lakh.

$\left(ii\right)$ 98 comes just before 99. So, 98 is the predecessor of 99.

$\left(iii\right)$ Whole numbers are {0,1,2,...}
0 is the first whole number. So it doesn't have a predecessor.

$\left(iv\right)$ Consider 10 (a 2 digit number). Predecessor of 10 is 9, which is not a 2 digit number. So Predecessor of a 2 digit number is not always a 2 digit number.