Question

17,98,26,?,35,80 find the missing number

Answer 1

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$26 -17 = 9; \\ 35 - 26 = 9 \\ \therefore98 – 9 = \boxed{ 89}$

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Answer 2

Answer:

89

Step-by-step explanation:

17 26 35

(+9) (+9)

98 89 80

(-9) (-9)