The positive integers 
and 
satisfy
What is the value of 
?
28
(prime factors)
From our combinatorics knowledge, we have the following combinations of factors
Clearly, only 
fits our condition of the form 
and 
Solving, we find that 
and 
.
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About
KS TengKS has been teaching H2/H1 Mathematics and IB mathematics for almost two decades. Having taught students from all various Junior Colleges, KS adapts to students' abilities and help them better understand the topics. As someone who loves to teach mathematics and sees it as a truly useful tool in life, KS seeks to enable students to appreciate math. Therefore, his tuition mission is to motivate and cultivate students to be independent and confident thinkers.