Question

Ron has to reach $3$ of his friend's houses to invite them for his birthday party. Ron asked his father how to reach $3$ of his friend's houses. His father told him that for reaching to $1^{\text{st}}$ friend's house you need to first take left, then take right, then left, and then again left. Ron's father asked him to follow the same order of turns from his $1^{\text{st}}$ friend's house to reach $2^{\text{nd}}$ friend's house and from $2^{\text{nd}}$ friend's house to $3^{\text{rd}}$ friend's house.

Ron created a code to remember the turns as
Left - $\text{L}$
Right - $\text{R}$

Find the process or sequence that Ron needs to follow for reaching $3$ of his friend's houses.

• A. $\text{LRLR}$
• B. $\text{LRLL}$
• C. $\text{LRLL LRLL}$
• D. $\text{LRLL LRLL LRLL}$

Answer 1

The correct option is D $\text{LRLL LRLL LRLL}$

Ron's father instructed him to first take left, then take right, then left, and then again left to reach his $1^{\text{st}}$ friend's house and follow the same order of turns to reach his remaining two friend's houses as well.

$\bullet$ The sequence of turns Ron follows to reach his $1^{\text{st}}$ friend's house from his home: $\underset{–}{\text{LRLL}}$

$\bullet$ The sequence of turns Ron follows to reach his $2^{\text{nd}}$ friend's house from his $1^{\text{st}}$ friend's house: $\underset{–}{\text{LRLL}}$

$\bullet$ The sequence of turns Ron follows to reach his $3^{\text{rd}}$ friend's house from his $2^{\text{nd}}$ friend's house: $\underset{–}{\text{LRLL}}$

$\therefore$ The sequence of turns that Ron follows to reach all $3$ of his friend's houses is $\underset{–}{\text{LRLL LRLL LRLL}}$, i.e., option (d.) is the correct one.