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| 70 per cent of what number is equal to 50 per cent of 80? |
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| If the sum of 6 consecutive numbers is 0, what is the greatest of these numbers? |
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| If the product of 5 integers is negative, at most how many of the integers can be negative? |
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| Sheila works 9 hours per day on Monday, Wednesday and Friday, and 7 hours per day on Tuesday and Thursday. She does not work on Saturday and Sunday. She earns $310 per week. How much does she earn in dollars per hour? |
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| A triangle has a perimeter 9. The two shorter sides have integer lengths equal to x and x + 1. Which of the following could be the length of the other side? |
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