Free GMAT Practice Question

Question 1 of 1
ID: GMAT-PSQ-017
Section: Quantitative Reasoning - Problem Solving
Topic: Maximum & Minimum value
Difficulty level: Medium

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If $x+y=4$ and $z=x^2+y^2$, what is the minimum value of $z$ ?

A1
B2
C4
D8
E16
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