State which of the following pairs are equal sets or equivalent sets.

$X=\{x:x$ is a prime number between $20$ and $40\}$
$\mathrm{Y}=\{\mathrm{x}:\mathrm{x}$ is a multiple of $11$ less than $50\}$

State which of the following pairs are equal sets or equivalent sets.

Write the cardinal number of the following sets.

Write the cardinal number of the following sets.

$X=\{x:x$ is a $2$-digit multiple of $3$ and $4\}$

Write the cardinal number of the following sets.

Write the cardinal number of the following sets.

$C=\{$colours of the rainbow$\}$

Write the cardinal number of the following sets.

$P=\{x:x$ is a planet of the solar system$\}$

Write the cardinal number of the following sets.

Write the cardinal number of the following sets.

$S=\{x:x$ is a perfect square less than $200\}$