7. Two numbers have a sum of 30 and their difference is 8. What is the product of the two numbers?
8. What is the smallest number that leaves a remainder of 2 when divided by 3,4,5 and 6
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9. Old McDonald has a farm and in his farm he had some chickens and pigs. The number of chicken
the same as the number of pigs. If there are 120 legs in all, how many animals are the
McDonald's farm ?