Directions: Each of the questions consists of a question followed by three statements. You have to study the questions and the statements and decide which of the statements(s) is/are necessary to answer the question. 

How many workers are required for completing the construction work in 10 days?
 I. 20% of the work can be completed by 8 workers in 8 days
 II. 20 workers can complete the work in 16 days
 III. One-eighth of the work can be completed by 8 workers in 5 days

One watch which gains uniformly is one minute slow at 1 pm on Tuesday and it is two minutes fast at 1 am on the following Friday. When had it shown the correct time?

The speed of train A is 16 km/h less than the speed of train B. To cover a distance of 384 km, B takes 4 hours less time than A. What is the speed (in km/h) of train B?

Vimal travels a certain distance at a speed of 80 km/hr. If Sohel travels one third of that distance at a speed of 60 km/hr then at what speed he should travel the remaining distance if total time taken by both Vimal and Sohel was same for the given journey?

The average weight of 5 men is increased by 4 kg. If one of them who weigh 121 kg is replaced by another man, then what is the weight of the new man? 

The ratio between compound interest and simple interest for a certain amount is 43 : 40 for 2 years, the find the rate of interest.

Two successive discounts of 40% and 20%, respectively, on the marked price of an article are equal to single discount of Rs 988. The marked price (in Rs) of the article is:

The sum of square of two number is 68 and square of the different of them is 36. Then multiplication value of two is.