Find a two digit number which is exactly three times the product of its digits?

A watch shows 6 p.m. where the hour hand points east. In which direction is the minute hand facing when the time is 9.15 p.m.?

If (7x+5)° and (x+5)° are complementary angles. then find value of x.

Pipes A, B and C together can fill a tank in 4 hours. Pipes A and B together can fill the tank in 9 hours. If pipes A, B and C are opened simultaneously, and after 3 hours, pipes A and B are closed, then how many hours will C alone require to fill the tank?

If '$$+$$' and '$$\div$$' ; '$$\times$$' and '$$-$$' are interchanged in the equation: $$17 \div 7 - 27 + 7 \times 37$$, then its value will be