exam
Maths Puzzle
Numerical Ability
An alloy of tin is 16% tin. How much tin must be added to make 820 lbs of alloy that is 18% tin? Answer to the nearest tenth.
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exam Other Question
Is the following trinomial a perfect square?
x^2 - 14x + 49
(-4xto the second y)2
__________
-12xy (to the -4)