H, V, G, T, F, R, E, P, ? 

(213*213 + 113*113 - 213*113)/(213*213*213 + 113*113*113) = ?

The angle between the minute hand and the hour hand of a clock when the time is 9:30 is:

What is the highest common factor (HCF) of ((3^125)-1) and ((3^35)-1)?

A man invested Rs. 1552 in a stock at 97 to obtain an income of Rs. 128. The dividend from the stock is:

An athlete runs a 200-meter race in 24 seconds. What is their speed in kilometers per hour?

 P and Q together can complete a piece of work in 4 days. If P alone can complete the same work in 20 days, in how many days can Q alone complete that work? 

 The speed of a boat in still water is 5km/hr. If the speed of the boat against the stream is 3 km/hr, what is the speed of the stream? 

Excluding stoppages, the speed of a train is 45 km/h and including stoppages it is 36 km/h. How many minutes does the train stop per hour?

Free notebooks were distributed equally among children of a class. The number of notebooks each child got was one-eighth of the number of children. Had the number of children been half, each child would have got 16 notebooks. Total how many notebooks were distributed?