a child wishes to build up a triangular pile of toy bricks so as to have 1 brick in the top row 2 in the second 3 in the third and so on.
if he has 100 bricks,how many rows can be completed and how many bricks will be remained??
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Answer. = 1+2+3+4+5+.... +13 = 91. Note: There is no definite formula for such a problem and you need to find it by the hit and trial manner choosing a suitable number you think will be the number of bricks in the last row and then calculate.
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