Question

Please help, I will give a fan and medal reward.

Answer 1

@nikato

Answer 2

ok. what do you need help with?
have you tried?

Answer 3

Well, I think number 1 is 20,26,32

Answer 4

that is correct

Answer 5

Do you see any relations btw the number of wheels and the size of train?

Answer 6

No.

Answer 7

What's the relation btw the wheels?
8,14,20,26,...

Answer 8

They're adding by 6.

Answer 9

I'm sorry. Didn't see any notification.

I hope you learned about arithmetic sequence because this is similar.

You first term would be 8 and the difference is 6
Remember formual is a = a1 + d(n-1)
Where a1 is your first term and d is distance

So
a= 8+6(n-1)

Answer 10

For 2., plug in 12 for n and solve for a

Answer 11

For 3., plug in 38 for a and see if you get an integer for n

Answer 12

And I already told you 4. If you were paying attention