Jashn is 22 weeks and 12 days older than me, whereas Rajiv is 86 weeks and 12 days older than Jashn. If Rajiv was born on a Sunday, on which day of the week was I born?
Rajiv is 22 + 86 = 108 weeks and 12 + 12 = 24 days older than me. Weeks are in multiples of 7 days. So we can ignore them. We can deal with the 24 days alone. Since 24 = 3 X 7 + 3, the excess days are 3. So we can count the day to Sunday + 3 = Wednesday..