Bobby's birthday is on Monday 5th June. On what day of the week will be…
2024
Bobby's birthday is on Monday 5th June. On what day of the week will be Pinky's Birthday in thesame year if Pinky was born on 22nd September?
- A.
Sunday
- B.
Friday
- C.
Monday
- D.
Tuesday
Attempted by 720 students.
Show answer & explanation
Correct answer: B
Key idea: Count the number of days from June 5 to September 22, then take that total modulo 7 to find how many weekdays to advance from Monday.
Days remaining in June: 30 - 5 = 25
Days in July: 31
Days in August: 31
Days in September up to the 22nd: 22
Total days = 25 + 31 + 31 + 22 = 109
Compute remainder modulo 7: 109 ÷ 7 = 15 remainder 4, so weekday advances by 4 days
Advance 4 days from Monday: Tuesday (1), Wednesday (2), Thursday (3), Friday (4) → Friday
Answer: Pinky's birthday falls on Friday.