As the first person is sitting on the chair numbered 3, the sixth person is five places away from the first person.
So, we need to add five places to the chair numbered 3.
$\therefore$  Sixth person will sit on the chair numbered 8.

i) 0 + 2 = 2 which is a whole number. Also, whole numbers are closed under addition.

ii) 0 ÷ 49843 = 0 which is a whole number.

iii) 98645 $\times$ 5678 = 5678 $\times$ 98645
This represents commutative property of multiplication.

The value of $64\times 50$ is
$64\times 50=\frac{(64\times 100)}{\mathrm{/2}}=3200$

The nearest greatest number is the successor of any number. So successor of 1289734 is 1289735.

The area occupied by one sweet will be $1\times 1=1$ sq units and she has to arrange 90 sweets in the box.
Minimum space needed by Ramya to arrange all the sweets is 90 sq units.
Except for $16\times 5$ the size of all the boxes is 90 sq units.
$16\times 5=80$ sq units so she cannot arrange all the sweets in this box.

To add 6 and 5 on the number line, we could do it in two ways:
1. Start at the number 5 and make 6 jumps to the right, we land at 11. Hence, 5 + 6 = 11.
2. Start at the number 6 and make 5 jumps to the right, we land at 11. Hence, 6 + 5 = 11.
Because we are adding numbers, we move towards the right on the number line. 

If 7 dots are arranged horizontally and vertically, we will get square.

If any number is a perfect square then we can form a square with that number.

The predecessor of any number is the number that comes immediately before that number. The predecessor of any number can be obtained by subtracting one from it.

All natural numbers are whole numbers. When zero is included in the list of natural numbers it becomes a set of whole numbers.