book Maths Puzzle Numerical Ability

the product of the page number on two facing pages of a book is 600. find the page numbers

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book Other Question

A canoeist paddled for 4 hours with a 6-km/h current to reach a campsite. The reutrn trip against the same current took 10 hours. Find the speed of the canoe in still water. Help me factor:
9c^2 - 169