QUIZZZZZ !! :o

Quizzing your knowledge is an integral part of learning. The joy attained when we know the answer to a question knows no bounds.Are you a good logical thinker? Do you solve puzzles? Then,put on your thinking caps and here is a chance to to give your grey cells some fine tuning.

TRY IT OUT FRIEND!  

1.Find the next number in the series
6,12,20,30.42.56,__?

72
64
70
84

2. Three friends A,B,C went for a party .There they measured their weight in some order in 7 rounds
A
B
C
A B
B C
C A
A B C
On the final round they measured 155 kg.Find the average weight of all the 7rounds ?

85
88.5
90.5
89.5
3.There are 5 persons A,B,C,D,E.D always sits right yo A.D & E never sits in extreme positions and in the middle position.Calways sit in extreme position .who sits immediate right to E?
A
B
C
D
4. In a mixture of 180 liters,the ratio of milk to water is 5:4.If the ratio of the milk to water is to be 4:5 ,then the amount of water to be added is ?
45 litres
20 litres
25 litres
80 litres