A water tank has three taps A, B and C. Tap A alone fills the tank in 4 hours, tap B alone fills it in 6 hours, and tap C alone empties it in 3 hours. How long will it take to fill the tank if all three are opened together?

Which alternative group logically fills the blanks in the following letter groups? ab..........y abe...........xw abcdev..........

Deepak walks 75 metres east, turns left and walks 25 metres, turns left again and walks 40 metres straight, then turns left and walks 25 metres. What is his distance from the place where he started?

Place K is 40 metres southwest of place B. Place G is 40 metres southeast of B. In which direction is G from K?

If A is the sister of J, L > V J + P and S × A + F E + K (where A×B means A is the son of B; A+B means A is the father of B; A>B means A is the daughter of B; A