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There are 9 coins 8 are 1 gm and 1 are 2 gm , how will you find the heavier coin in minimum number weighing and how many weighing it will need?

how do i solve this {(16*9*7*5*11*13*17*19)-2} mod 50

in an examination, 7500 candidate appeared. each offered either physics or chemistry or both. if 75% offered physics and 45% of chemistry how many offered both

What are the post in ssc that do not have a computer typing test

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which trade is best in mechanical for alp exam ? plz tell me!!

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