Question

[Tô Mai Phương]

Your school is having a canned food drive for Harvesters. How many total cans would you have if you made a solid pyramid with \(15\cdot15\) cans on the first level, \(14\cdot14\) on the second level and continue the pattern all the way up to just one can on top?

Answer 1

[Nguyễn Xuân Nam]

1240 cans nha bạn.

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Answer 2

[Nguyễn Xuân Nam]

15*15+14*14+13*13+12*12+11*11+10*10+9*9+8*8+7*7+6*6+5*5+4*4+3*3+2*2+1*1=1240(cans)

Đáp số 1240 cans nha bạn.

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