Question

No. of songs	$1$	$3$	$5$	$7$	$9$
Practice time (in hours)	$7$	$21$	$35$	$49$	?

As per the table, how many hours are required to practice $9$ songs?

• A. $55$
• B. $59$
• C. $63$
• D. $67$

Answer 1

The correct option is C $63$

The following is the given table:

No. of songs	$1$	$3$	$5$	$7$	$9$
Practice time (in hours)	$7$	$21$	$35$	$49$	?

We can see that the practice time follows a pattern rule for the no. of songs made.
Hence,
$1\times 7=7$
$3\times 7=21$
$5\times 7=35$
$7\times 7=49$

$\therefore \text{The pattern followed by the given data}$ $\text{is:}$

$\text{Practice time (in hr)}=\text{No. of songs}\times 7$

Therefore, for 9 songs, we get the practice time as:
$9\times 7=63$

Hence, 63 hours are required to practice 9 songs.