Week 2 Day 8 Pythagorean Triples

The question is above.
Maybe I have misunderstood this question, but I thought the smallest possible hypotenuse above 38 was 39, from the 51213 triangle with its sides multiplied by 3, but the explanation says the hypotenuse is 42, which is the smallest length that will not work as a hypotenuse and is above 38.
Have I misunderstood, or is this a typo?

@sereneseagull Huh weird I got the same answer and I believe it's a typo...