exam Maths Puzzle Numerical Ability

Find three consecutive even integers so that 7 times the third is equal to 20 less than the first.

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exam Other Question

f(x) = 5x + 21/x; f(x) = -38 BEN IS MAKING WOODEN FOR THE NEXT ARTS AND CRAFTS SALE. EACH TOY COSTS BEN $1.80 TO MAKE. IF HE SELLS THE TOYS FOR $3.00 EACH, HOW MANY WILL HE HAVE TO SELL TO MAKE A PROFIT OF EXACTLY $36.00?