exam Maths Puzzle Numerical Ability

Triangles ABC and DEF are similar
AB=5.0 cm
BC=6.0 cm
AC=7.0 cm
If triangle DEF has a perimeter of 360 degrees find the length of the sides of ABC

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saxon math - algebra 1 - test 17 - form-b - problem #16 How many integers in the set of all integers from 1 to 100, unclusive, are not the square of an integer?

(A) 19
(B) 50
(C) 81
(D) 89
(E) 90