GMAT-Quantitative Aptitude Questions and Answers
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Q181
A man can do a piece of work in 60 hours. If he takes his son with him and both work together then the work is finished in 40 hours. How long will the son take to do the same job, if he worked alone on the job?
Answer: Option B
Q182
A, B and C can do a work in 5 days, 10 days and 15 days respectively. They started together to do the work but after 2 days A and B left. C did the remaining work (in days)
Answer: Option D
Q183
X alone can do a piece of work in 15 days and Y alone can do it in 10 days. X and Y undertook to do it for Rs. 720. With the help of Z they finished it in 5 days. How much is paid to Z?
Answer: Option B
Q184
Ram starts working on a job and works on it for 12 days and completes 40% of the work. To help him complete the work, he employs Ravi and together they work for another 12 days and the work gets completed. How much more efficient is Ram than Ravi?
Answer: Option D
Q185
A red light flashes 3 times per minute and a green light flashes 5 times in two minutes at regular intervals. If both lights start flashing at the same time, how many times do they flash together in each hour?
Answer: Option A
Q186
A and B can do a piece of work in 21 and 24 days respectively. They started the work together and after some days A leaves the work and Bcompletes the remaining work in 9 days. After how many days did A leave?
Answer: Option B
Q187
Ram, who is half as efficient as Krish, will take 24 days to complete a work if he worked alone. If Ram and Krish worked together, how long will they take to complete the work?
Answer: Option C
Q188
A number is selected at random from first thirty natural numbers. What is the chance that it is a multiple of either 3 or 13?
Answer: Option B
Q189
What is the probability of getting at least one six in a single throw of three unbiased dice?
Answer: Option D
Q190
What is the probability that a two digit number selected at random will be a multiple of '3' and not a multiple of '5'?
Answer: Option B