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"The sum of the squares of the lengths of the four sides of a parallelogram equals the sum of the squares of the........

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"The sum of the squares of the lengths of the four sides of a parallelogram equals the sum of the squares of the lengths of the two diagonals" is known as what?

posted Nov 21, 2018 by Prithvi

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Sum of the building

Read the given information carefully and answer the question. Each of the six buildings, C, D, E, F, G and H has different number of floors. E has the second lowest number of floors. D has more number of floors than C and H but less than F. F does not have the maximum number of floors. H has less number of floors than both G and E. The building having second highest number of floors has 40 floors. C has 28 floors.
If the number of floors in buildings E + C is seven more than the number of floors in building F, how many floors are there in building E?

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