Nitin was counting down from $32$. Sumit was counting upwards starting from $1$ and he was calling out only the odd numbers. What common number will they call out at the same time if they were calling out at the same speed?

Manoj and Sachin are ranked seventh and eleventh respectively from the top in a class of $31$ students. What will be their respective ranks from the bottom in the class?

Saiyeev ranks seventh from the top and twenty-eighth from the bottom in a class. How many students are there in the class?

Ajay left home for the bus stop $15 \,minutes$ earlier than usual. It takes $10 \,minutes$ to reach the stop. He reached the stop at $8:40 \,a.m.$ What time does he usually leave home for the bus stop?

Satish remembers that his brother's birthday is after $15^{th}$ but before $18^{th}$ of February,whereas his sister Kajal remembers that her brother's birthday is after $16^{th}$ but before $19^{th}$ of February. On which day in February is Satish's brother's birthday (in $^{th}$)?

Mohan is older than Prabir,Suresh is younger than Prabir. Mihir is older than Suresh but younger than Prabir. Who among the four is the youngest?