A contract is to paint 3 houses. Mr brown takes 6 days to paint a house. Mr black takes 8 days and Mr blue 12 days. Mr brown leaves for a vacation after 8 days. Mr black works for 6 days from then.How many days would Mr blue require to complete the contract?5 7504
A circle is inscribed in a square. Another circle is circumscribed in a square of the same side used earlier. what is the ratio of the areas of the inscribed circle to that of the circumscribed circle?3 6141
Each side of a rectangle is increased by 100%. What is the increase in % of its area?3 6221
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