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221 221 - 11² = 221 – 121 = 100 100 - 10² = 100 – 100 = 0 0 - 9² = – 81 -81 - 8² = 81 – 64 = - 145
A does 2/5 of a work in 9 days. Then B joined him and they together completed the remaining work in 6 days. B alone can finish the whole work in
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Before servicing, a car runs at a speed of 20 km/hr while after servicing, it runs at a speed of 30 km/h. After servicing the car covers a certain dista...
'Ravi' can complete some work alone in 25 days. 'Shyam' is twice as efficient as 'Mohan' and four times as efficient as 'Ravi'. If 'Ravi' and 'Mohan' st...
"A" can complete a task in 15 days, while it takes 25 days for "B" to complete the same task. The ratio of the efficiencies of "A" and "C" is 2:1. If a ...
A can complete a work in 40 days. B takes 20 days less than A to complete the same work. In how many days can both of them together complete 90% of the ...
‘X’ and ‘Y’ are capable of finishing a work in 9 days and 12 days respectively. They worked together for 3 days. Find the number of days ‘Y’...
‘A’ alone can complete a work in 18 days. ‘B’ alone can complete the same work in 25 days. If ‘A’ and ‘B’ work together for 5 days, then...
If 3 men with 4 boys can earn Rs. 2940 in 7 days and 5 men with 9 boys earn Rs. 4620 in 6 days. In how many days will 5 men with 3 boys earn Rs. 11...
Naina and Kalpana working together can do a piece of work in 10 days, whereas Naina alone can do it in 12 days. In how many days can Kalpana do it alone?
