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If a can do a piece of work alone in 7 days and b can do it alone in 4 days, how long will it take the two working together to complete the job?
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One hectometer is a) 1/1000 of a meter. b) 1/100 of a meter. c) 10 meters. d) 100 meters. e) 1000 meters.
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12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart
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If a can do a piece of work alone in 7 days and b can do it alone in 4 days, how long will it take t...
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