SOLUTION: there are two numbers in the number at the beginning there;s 19 and the next one is blank then the 3rd one is 53 then there's 4 more blanks to be filled in

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Question 396368: there are two numbers in the number at the beginning there;s 19 and the next one is blank then the 3rd one is 53 then there's 4 more blanks to be filled in
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
19, ___, 53, ___, ___, ___, ___

interval = (53 - 19)/2 = 17

finished: 19, 36, 53, 70, 87, 104, 121