Dhruv's birthday is on Sunday 28th May. On what day of the week will be Sahil's Birthday in the same year if Sahil was born on 19th October?
Dhruv's birthday is on Sunday 28th May.
⇒ 28th May → Sunday
Sahil was born on 19th October.
⇒ 19th October → ?
28th May to 19th October
→ 3 Day in May.
→ 30 Day in June.
→ 31 Day in July.
→ 31 Day in August.
→ 30 Day in September.
→ 19 Day in October.
Total day between 28th May to 19th October = 3 + 30 + 31 + 31 + 30 + 19 = 144
⇒ Reminder = 144 % 7 = 140 + 4 = 20 × 7 + 4
Therefore, 4th day after Dhruv’s birthday will be Sahil’s Birthday.
0 → Sunday 1 → Monday; 2 → Tuesday; 3 → Wednesday;
4 → Thursday; 5 → Friday; 6 → Saturday
Sahil’s Borthday = Druv’s Birthday + 4th day = Sunday + 4th day = Thursday.