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Math Challenge I-A Spring 2019 Week 5

 
 
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Re: Math Challenge I-A Spring 2019 Week 5
by David Reynoso - Monday, April 1, 2019, 10:41 AM
 

Just in case you still need some help with this problem: The leading digit is the first digit on the left, so you want to find how many numbers between $20$ and $60$ are divisible by their tens digits.