Four persons A, B, C and D consisting of two married couples are in a group. Both the women are shorter than their respective husbands. A is the tallest among the four. C  is taller than B. D is B's brother. In this context, which one of the following statements is not correct ?

 A father is nine times as old as his son and the mother is eight times as old as the son. The sum of the father's and the mother's age is 51 years. What is the age of the son ?

In a test, a candidate attempted only 8 questions and secured 50% marks in each of the questions. If he obtained a total of 40% in the test and all questions in the test carried equal marks, how many questions were there in the test?

 An automobiles owner reduced his monthly petrol consumption when the prices went up. The price-consumption relationship is as follows:
Price (in Rs. Per litre)                   40    50    60    75
Monthly consumption (in litres)     60    48    40    30
If the price goes up to Rs. 80 per litre, his expected consumption (in litres) will be

Twelve people form a club. By picking lots, one of them will host a dinner for all once in a month. The number of dinners a particular member has to host in one year is

In a parking area, the total number of wheels of all the cars (four-wheelers) and scooters/motorbikes (two-wheelers) is 100 more than twice the number of parked vehicles. The number of cars parked is