Mari has 28 wooden cubes. she want to stack them to form a triangle. each row will have one block fewer than the row below it. how many blocks will be on the bottom of the pyramid?

Huixian needs to pack 171 pens,63 pencils and 27 erasers in to identical gift bags so that each item is equally distributed among the gift bags. find (i) the largest number of gift bags that can be packed, (ii) the number of each item in a gift bag