Liza bought 10 kilograms of butter to make cookies. She used one-half of it for chocolate chip cookies, one-fifth of it for peanut butter cookies, and one-third of the remaining butter for sugar cookies. How many kilograms of butter are left after making those three kinds of cookies?
Liza used 10/2 = 5 kilograms of butter for the chocolate chip cookies.
Then, she used 10/5 = 2 kilograms of butter for the peanut butter cookies.
She used 5 + 2 = 7 kilograms of butter for the chocolate and peanut butter cookies.
So, only 10 -7 = 3 kilograms of butter was left.
Then, Liza used 3/3 = 1 kilograms of butter for the sugar cookies.
Therefore, only 3-1 = 2 kilograms of butter were left.