Rina's period occurs every 28 days. Her last period was on the 5th of March. On which day is she most likely to get her next period? [Pg. No. 222]

Rina's cycle is of 28 days, her period repeats every 28 days. Her last period was on 5th March, so add 28 days to this date.
March has 31 days, so after 5th March, 26 days are left in March (31 – 5 = 26). The remaining 2 days (28 – 26 = 2) fall in April. So, 5th March + 28 days = 2nd April. Therefore, Rina is most likely to get her next period on the 2nd of April.