# What's the sequence?

Joe likes 2025 but not 2024; he likes 529 but not 530; he likes 400 but not 500. Which does Joe like - 3600 or 3700? Why?

• Can you comment on the second answer that I provided or provide more clarity or hints
– skv
Nov 13, 2014 at 9:19
• To answer your question I would have to submit the answer to the people that requested it from me. Since I never solved it I don't feel appropriate to provide the answer to them. Therefore we will never know which is the correct answer. Nov 14, 2014 at 2:10
• Since the asker has no idea what the answer is I propose closing this as primarily opinion based
– skv
Nov 14, 2014 at 7:26
• Seconded. Why post a puzzle you don't know the solution for? Nov 14, 2014 at 9:28
• Well I didn't know I had to know the answer to the puzzle. Sorry, I guess I should have learned the forum rules. Nov 15, 2014 at 18:40

He likes 3600 because that is a perfect square (60*60) like the other numbers.

2025 = 45*45

529 = 23*23

400 = 20*20

• so there's another answer...hummmm Nov 13, 2014 at 2:09

Another response similar to the answer given earlier

When you add the digits in the numbers he likes it results in perfect squares so he likes 3600

2+0+2+5 =9

5+2+9=16

4+0+0=4

• That's a very interesting answer. Correct tho. Nov 14, 2014 at 2:07