Question 288292
Give the GCF of 
25p^2q^3, 
45p^5q^2, 
75p^4q^3
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A. 5p5q3
B. 5pq
C. 5p2q2
D. 45p4q3 
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It's not D because of the 45.  
A, B and C all have a 5
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Check for the lowest exponent of p:  it's 2 in the 1st term.
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Check for the lowest exponent of q:  it's 2 in the 2nd term.
--> 5p^2q^2
C