State whether the following statements are true (T) or false (F):

(i) The successor of a one-digit number is always a one-digit number.

(ii) The predecessor of every two-digit number is a one-digit number.

(iii) The predecessor of a 3-digit number is always a 3-digit number.

(iv) The successor of a 3-digit number is always a 3-digit number.

(v) If a is any whole number, then a ÷ a = 1

(vi) If a is any non-zero whole number, then 0 ÷ a = 0

(vii) On adding two different whole numbers, we always get a natural number.

(viii) Between two whole numbers there is a whole number.

(ix) There is a natural number which when added to a natural number, gives that number.

(x) If the product of two whole numbers is zero, then at least one of them is zero.

(xi) Any non-zero whole number divided by itself gives the quotient 1.

The whole number which does not have a predecessor in whole number system is

1. 0

2. 1

3. 2

4. none of these

The predecessor of 1 million is

1. 9999

2. 99999

3. 999999

4. 1000001

The product of the predecessor and the successor of the greatest 2-digit number is

1. 9900

2. 9800

3. 9700

4. none of these