Question

Given the table below:

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

How much time (hours) is required to practice $9$ songs?

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

Answer 1

The correct option is C $63$

From the given table:

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

We can see that the practice time follows a pattern rule (Multipling 7) for the no. of songs made.
Hence,
$1\times 7=7$
$3\times 7=21$
$5\times 7=35$
$7\times 7=49$
$9\times 7=63$.
Ans: 63