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Math Challenge I-C Handout 6

 
 
Picture of Patrick Zhang
Math Challenge I-C Handout 6
by Patrick Zhang - Monday, 16 April 2018, 6:01 PM
 

I am confused by the wording of question 6.22 part c).

By "at least" does it mean something like AABB, or does it mean something like AAAB? or both? 

 
Picture of David Reynoso
Re: Math Challenge I-C Handout 6
by David Reynoso - Tuesday, 17 April 2018, 4:22 PM
 

Both work since both have two (or more) times the letter $A$, so they have at least one pair of repeating letters.

 
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