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From: Steve secondary level question Parent Question: John likes 400 but not 300; he likes 100 but not 99; he likes 2500 but not 2400. Which does he like? 900 1000 1100 1200 

Hi Steve, Look at the factors of numbers he likes and dislikes.
The numbers he likes are all perfect squares and are only made up of 2's and 5's. Based on the given information there are two logical answers:
Penny 

