SOLUTION: the floor of a square hall is tiled with unbroken square tiles . along the two diagonals there are 125 tiles altogether . how many tiles are there in the hall?
a 15625 b 1562
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a 15625 b 1562
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Question 252532: the floor of a square hall is tiled with unbroken square tiles . along the two diagonals there are 125 tiles altogether . how many tiles are there in the hall?
a 15625 b 15624 c 1537 d 2985 e 3969 Answer by edjones(8007) (Show Source):
You can put this solution on YOUR website! Draw a diagram of a square with 25 equal squares in it. Count the squares along the 2 diagonals. There are 9. because you didn't count the central square twice.
If you add 1 and divide by 2 you get the number of squares on each side.
125+1=126
126/2=63 tiles on a side
63^2=3969 tiles in the hall.
.
Ed
