In a row of girls, if Savitha who is tenth from the left and Anita who is ninth from the right interchange their places, Savitha becomes fifteenth from the left. How many girls are there in the row?

$A$ bus for Delhi leaves every thirty minutes from a bus stand. An enquiry clerk told a passenger that the bus had already left ten minutes ago and the next bus will leave at $9:35 \,a.m.$ At what time did the enquiry clerk give this information to the passenger?

The priest told the devotee,"The temple bell is rung at regular intervals of $45 \, \text{minutes}$. The last bell was rung five minutes ago. The next bell is due to be rung at $7:45 \, \text{a.m.}$" At what time did the priest give this information to the devotee?

How many days will there be from $26^{th}$ January,$1988$ to $15^{th}$ May,$1988$ (both days included)?

Rahul ranked ninth from the top and thirty-eighth from the bottom in a class. How many students are there in the class?

If the seventh day of a month is three days earlier than Friday,what day will it be on the nineteenth day of the month?