IF CA=31, GE=75, FH=

Which one of the following is correct?

The angles of pentagon in degrees are a, a+20, a + 40, a + 60, a + 80.The smallest angle of the pentagon is

The mean of 10 items is 17 and if each item is increased by 5 then its mean will be

Father is 5 years older than mother and mother’s age is now thrice the daughter’s age. If daughter is 10 years old now, what was father’s age when daughter was born?

The greatest value of sin x. cos x is