Universal Set

Q. What will be the universal set for the sets $A=\{4,8,9\};B=\{1,4,8\};C=\{1,9\}?$

1. $U=\{1,4,8,9\}$
2. $U=\{1,4,5,7,8,9\}$
3. $U=\{1,4,5,7,8,9,11,12,15\}$
4. $U=\{1,4,5,8\}$

Q. Which of the following sets can be the universal set for a set of all natural numbers.

1. Set of all real numbers $R$
2. Set of all integers $I$
3. Set of all whole numbers $W$
4. Set of all rational numbers $Q$

Q. Which of the following sets can be the universal set of $A=\{10,20,30,...\}$

1. Set of all Multiples of $5$
2. Set of all even natural numbers
3. Set of all odd natural numbers
4. Set of all multiples of $20$

Q. $U$ is the universal set for the sets $X,Y,Z,M,N,O\&P,$ then tap the bubbles having correct expressions.

1. $U\supseteq X$
2. $U\supseteq M$
3. $U\subseteq P$
4. $O\subseteq U$
5. $O\subseteq U$
6. $X\subseteq U$
7. $U\supseteq Z$
8. $U\subseteq N$