Book Maths Puzzle Category

216 small cubes are combined to form a cube.A diagonal is drawn which passess through the centre of the cube.How many small cubes does the diagonal touches??

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Book Other Question

what is the remainder when 2(8!)-21(6!
) divides 14(7!)+14(13!)
A man buys a milk at Rs.8.5 per litre & dilutes it with water. He sells the mixture at the same rate & thus gains 11.11%. Find the quantity of water mixed by him in every litre of milk ?