Mara is building a wind chime. She needs string in the following lengths: six
pieces of 20 cm, 3 pieces of 30 cm and one piece of 40 cm. How much string does
she need?

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