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where is 30 on the number line so on the number line right over here we see we'll just go from zero the first last year isn't one it's three so every slash here is going to go up by three so let's say figure out where 30 is so this is already marked as three now this is going to be three more is 6 9 12 15 18 21 24 27 30 another way you could have thought about it is if each of these marks are three to get to 30 we have to go to ten of these marks so you go 1 2 3 4 5 6 7 8 9 10 let's do a few more where is 24 on the number line well once again each of these marks is again 3 so it's going to be 3 6 9 12 15 18 21 and 24 let's do one more so now each mark is 4 so we're going to go 4 8 12 16 20 another way you could think about it is if we're going up by 4 you have to go up 5 times to get up to 20 so this is 1 2 3 4 5 either way this should be the right answer