Question

If republic day falls on Friday this year and Shyam was born on 4 days before 12th January, then he celebrates his birthday on:
$
  {\text{A}}{\text{. Tuesday}} \\
  {\text{B}}{\text{. Sunday}} \\
  {\text{C}}{\text{. Monday}} \\
  {\text{D}}{\text{. Wednesday}} \\
$

Answer 1

For days 7 days before and 7 days after a particular date, the week day is the same. So keep going back 7 days till we reach close to 12th January or the birth date.

Complete step-by-step answer:
Shyam is born 4 days before 12th January, so the birth date is 8th January.
Now, the day on 26th of January is Friday. That means 7 days prior to this date will also be a Friday.
So, the date 7 days before to 26th January will be (26-7) = 19th January. And the week day is Friday.
Similarly, the date 7 days before 19th will have Friday. The date is (19-7)= 12th January. Since, Shyam is born 4 days prior to 12th January we pass a Thursday, a Wednesday, a Tuesday and reach Monday. Therefore we have Monday as his birthday. So, Shyam celebrates his birthday on Monday.
The correct option is C.

Note- To do these types of questions, it is important to know the pattern followed. These are mental ability questions, which tests pattern recognition ability of the student.