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For ASTM grain size number 10, give the number of grains per square inch at a magnification of 100x.

For ASTM grain size number 10, give the number of grains per square inch at a magnification of 100x. Correct Answer 512

The number of grains per square inch is given by N * (M/100)2 = 2n-1 where n is ASTM grain size number N is the number of grains in one square inch M is the magnification It gives 512 grains per square inch.

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