self Maths Puzzle

What will be the remainder if 17^200 is divisible by 18?

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self Other Question

A n B run a race of 1km.if a give b a start of 50m a wins by 14sec.n if a give b a start of 22 sec b wins by 20m.find tym taken by a to cover 1 km? A man starts walking, He walked 2 km in the first hour. Then, he walked two third of the previous our in each next hour. lf he walked continuously then how long maximum could he walk ?