Book Maths Puzzle

the remainder when 17^200 is divided by 18 ?

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1 is the ans
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Book Other Question

The cost of Type 1 material is Rs. 15 per kg and Type 2 material is Rs.20 per kg. If both Type 1 and Type 2 are mixed in the ratio of 2 : 3, then what is the price per kg of the mixed variety of material? What least number should be subtracted from 13601 such that the remainder is divisible by 87 ?