9 9 9 9 5 5 5 5 3 3 3 3 1 1 1 1 Out of these numbers six numbers add to 21. What are the 6 numbers?

[] + [] + [] = 30

Fill the boxes using one of these numbers 1, 3, 5, 7, 9, 11, 13, 15

You can also repeat the numbers.

? + ? + ? + ? + ? = 30

You have to fill numbers in place of question marks. The numbers that you can use are 1, 3, 5, 7, 9, 11, 13 and 15. You can repeat the numbers if you like.