Question 4 :
What is the multiplicative identity element in the set of whole numbers?

Question 5 :
Match the following.<br>If a, b, c, are whole numbers, then<table class="wysiwyg-table"><tbody><tr><td></td><td>Column-I</td><td></td><td>Column-II</td></tr><tr><td>(i)</td><td>a + b = b + a</td><td>(a)</td><td>Distributivity of multiplication</td></tr><tr><td>(ii)</td><td>(a + b) + c = a + (b + c)</td><td>(b)</td><td>Commutativity under addition</td></tr><tr><td>(iii)</td><td>a x (b + c) = a x b + a x c</td><td>(c)</td><td>Associativity of addition</td></tr><tr><td></td><td></td><td>(d)</td><td>Commutativity under multiplication</td></tr></tbody></table>

Question 6 :
If we write natural numbers from $1$ to $100,$ the number of times the digit $5$ has been written is

Question 8 :
If n is a whole number such that $n + n = n$, then $n =$ ?

Question 9 :
If $(31 + 15) + x = 31 + (15 + 23)$, then by using associativity of addition $x= $

Question 10 :
Select the correct order for defining the following terms:<br>I - natural number<br>II -imaginary number<br>III -rational number<br>IV -integer

Question 12 :
The number of whole numbers between $ -6 $ and $ 6 $ is

Question 13 :
The sum of the additive inverse and multiplicative inverse of $2$ is ____________.

Question 15 :
The number of whole numbers between the smallest whole number and the greatest 2-digit number is: