Book Maths Puzzle

What is the least number which when divided by 5, 6, 7 and 8 leaves a remainder 3, but when divided by 9 leaves no remainder?

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Book Other Question

The H.C.F. of two numbers is 5 and their L.C.M. is 150. If one of the numbers is 25, then the other is: John bought 20 kg of wheat at the rate of Rs.8.50 per kg and 35 kg at the rate of Rs.8.75 per kg. He mixed the two. Approximately at what price per kg should he sell the mixture to make 40% profit as the cost price?