book Maths Puzzle Numerical Ability

it says solve the inequality 2x-5<10 or 33-4x<5.



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Jill has $3.50 in nickels and dimes. If she has 50 coins, how many of each type of coins does she have? I need to know an X and a Y. THANK YOU My question says to remember the formula 1020 sqrt P (1-.01 sqrt P)=G. If P is the population in thousands. this formula is the amount of water in gallons per minute the city needs