book Maths Puzzle Numerical Ability

the number of square feet in the area of a square is 5 more than the number of feet in the perimeter of the square. Find the lentgh of a side.

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book Other Question

what is the cardinal number for this set
(1,3,5,.....1001)
(1,2,4,8,....1024)
FOr a fixed rate, a fixed principal amount, and a fixed compounding cycle, the return is an exponential function of time. Using the formula, A=P(1 +r/n)nt, let r=8%, P = 1, and n = 1 and give the coordinates (t,A) for the points where t = 0,1,2,3,4.