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Any whole number greater than 1 that is divisible only by 1 and itself, is defined as a prime number. For example, 7 has only 2 factors, 1 and 7 itself. So, it is a prime number. However, 4 has three factors, 1, 2 and 4. Therefore, it is not a prime number. It is a composite number.
40 tailors can stitch a batch of dresses in 30 days. If 20 tailors started the job and after 15 days ‘u’ more tailors joined them such that the rema...
A and B can complete a work in 18 hours. A leaves the work after 6 hours. B takes 36 hours to complete the remaining work. If A works alone. then how ma...
A work is done by A, B, C and D together. The percentage of work done by A, B C and D are in arithmetic progression (AP). The first, second, third and f...
A and B together can complete a task in 12 days, while A alone can complete the same task in 20 days. If A and B start the work together, but B leaves a...
A alone can complete 70% of a work in 21 days while B takes 15 days more than A to complete it. If B and C together can complete the work in 20 days, th...
Akash can finish a task alone in 24 days, while Akash and Bittu working together can complete the same task in 14 days. If Bittu ...
120 unit of work can be completed by P alone in 20 days. P started working alone and joined by Q after 10 days such that they completed the remaining wo...
Ratio of the work done by P, Q and R in one day is 7:4:9 respectively. They all together can complete the work in 44 days. Q and R worked on it for 30 d...
Raj, Sanjay and Vaibhav can separately finish a work in 20, 30 and 40 days, respectively. In how many days Raj can finish the work if he is assisted.by ...
Aman, Bittu, and Chintu can each complete a task in 20, 30, and 60 days, respectively. How many days will it take for Aman to finish the work if he is h...
