Can not find the missing numbers in these sequences! Please help! Thank you

[genevieve_autum]

This homework was given to my 6 year old nephew, I think its a mistake by his teacher because its too difficult and he hasn't learnt prime numbers which was the solution for the first one but we can't work out the next ones, please help!!!

fill the spaces so the numbers are in order:

2 ? 6 ? ? 10 ? ? ? 16

so for this one, after crossing off the prime numbers that come in between you enter the remaining numbers.

so its 2 4 6 9 12 14 15 16

but we cant work out the next ones:

6 ? 12 ? ? 17 ? ? 22 ?

5 ? ? 12 ? ? 19 ? ? 24

? 10 ?16 ? ? 20 ? ? 27

2 ? ? 9 ? ? 14 ? ? 25

if you know the anwers please help!!!!!

Thank you

 

[Bob Brown MSEE]

May be simple

But first...
2 4 6 8 9 10 12 14 15 16
by your suggestion.

However, given the age level, the teacher may not have had primes in mind at all. I suspect that there are many acceptable answers like ...
2 3 6 7 8 10 11 13 14 16
Just as long as long as the blanks are filled by natural numbers so that the final list is in order.