Cambridge level

john makes a sequence of numbers his rule is to add same amount each time write in missing numbers subtract -1 from each number his answer is 19 add three times a number and give the answer -1,...., ....., ......., 19
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1 Answer

?????????????? du yu tri tu sae the DIFFER tween eech number=KONSTANT ?????????

Yu hav 3 emptee spots

differ tween last & first=19 -(-1)=20

Thus, differ=20/3=6.6666666666666666666666666...
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