There are 61 pieces placed in several squares, each of which must be placed. A maximum of 5 pieces can be placed in one lattice. At least how many squares have the same number of pieces?

At least five checkers have the same number
61/（1+2+3+4+5）=4.1
So when there are 21 to 25 squares, the number of repeated pieces is the least, and the number of pieces in 5 squares is 1 to 5
When there are 5 1,2.3.4.5 and 4 1,2.3.4.5 in 21 lattices
When there are 5 2 of 22 lattices and 4 of 1.3.4.5 respectively
.
When 25 lattices are 5, 1.2.3.4 are 4 respectively

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