11²+12²+13²+........+20²=?
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2485 is the right answee
Alka446:
2485 is r
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11 square+12 square+13 square+14 square+15 square+17 square+18 square+19 square+20 square
121+144+169+196+225+256+289+324+361+400= 2485
121+144+169+196+225+256+289+324+361+400= 2485
plz mark me as brainliest
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