Let the total number of questions be x. then, Percentage need in exam = 40% Correct answer = 60 percentage = (correct answer)/(total questions) x 100 40 = (60/x) x 100 x = 150 Alternate method Given that 60 ≡ 40% 1 ≡ 
% 150 ≡ 100% Therefore, Total number of questions = 150
A can complete a piece of work in 12 days, and B can complete the same work in 16 days. They work together for 4 days, and then A leaves. How many more ...
A train travels at a speed of 60 km/h for the first 1 hour, 50 km/h for the next 2 hours, and 40 km/h for the next 3 hours. What is the average speed of...
A boat goes downstream for 44 km and immediately return. It took the boat twice as long as to make the return trip. If the speed of river flow were twic...
The speed of a train is 72 km/hr and it takes 12 seconds to cross a man. Find the time taken by train to cross a platform if the ratio of the length of ...
The speed of a bike increases by 3 km/hr after every 1 hour. If the distance travelled by the bike in 1st hour is 22 km, the find the total distance tra...
Three runners A, B and C run a race, with runner A finishing 12 meters ahead of runner B and 18 meters ahead of runner C, in another race of same type r...
Excluding stoppage, the speed of the bus is 66 km/hr, and including stoppage, it is 55 km/hr. How many minutes does the bus stop per minute?
Ratio of speeds of ‘A’ and ‘B’ is 6:11, respectively. If they participate in a 220-metre race and ‘B’ gives ‘A’, a head start of ‘m’...
Time taken by a boat to travel certain distance in upstream direction is twice the time taken by the boat to cover same distance in downstream direction...
It takes 8 hours less to travel from point 'E' to point 'F' at a speed of 60 km/h than it takes to travel the same distance at 24 km/h. If 30% of the di...
