The distance between any two consecutive numbers is 1 unit. So the distance between number 2 and 7 is 5 units.

In this hypothetical universe, each number is represented by dots such that the number of dots in that universe corresponds to the value of the number it represents in this universe.
Hence, to represent two, we use two dots. When we join two dots by a straight line, we get a line segment and nothing else, as shown.

Numbers 4, 9, 16 can form squares as they are perfect squares of 2, 3 and 4 respectively.

The distance between any two consecutive numbers is 1 unit. So the distance between number 1 and 7 is 6 units.
We can write it as = 7 - (+1)
= 6
So, Ineed to move 6 steps to reach number 7 from number 1.

When we add any two natural numbers, the answer is always a natural number.
For example: Take any two natural numbers say 5 and 7. Add them 5 + 7 = 12, 12 is also a natural number.

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

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.

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 × 5678 = 5678 × 98645
This represents commutative property of multiplication.

If you divide something by 2 you divide that thing into 2 parts. If you divide something by 4 you divide that thing into 4 parts. Now if you divide something by 0, you cannot divide that thing into 0 parts. So a division by 0 is undefined and Rahuli s correct.