exam Maths Puzzle Numerical Ability

Western State College is 18 years older than Southern State. Western is also 2 1/2 times as old as Southern State. How old is eac?

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Trader Joe has 3 pounds of walnuts and 6 pounds of almonds sell for $51. Five pounds of walnuts and 4 pounds sell for $55. Find the price of 1 pound of almonds.
I am Totally confused. Trying to help my son. Please help. 2.) Consider a 60-W light bulb. A watt (W) is defined as a joule per second (J/s). Write the quantity 60 W in terms of the units Newton (N), meter (m), and second (s).