Question

X was born on $3^{rd}$ March, $1980.$ Y was born $4$ days before X. The Republic Day of that year fell on Saturday. Then which days was Y's birthday? Write the number of the day counting Monday as $1$, Tuesday as $2$ and so on.

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

Answer: (D)

$4$

X's birthday $=3^{rd}$ March, $1980$
Y's birthday $={28}^{th}$ Feb. $1980$ (Because $1980$ is a leap year)
${26}^{th}$January $1980=$ Saturday
Total no. of days till ${28}^{th}$ Feb
$=5$ days from Jan + $28$ days of Feb.
$\frac{5+28}{7}=\frac{33}{7}$ days $\Rightarrow$ $5$ odd days
So, birthday is on Thursday ($4$ for Thursday)

option D