Question
Ivan had some pens. He gave 56 of his pens to Valen and bought 4 new pens. After that, he gave 35 of his remaining pens to his cousin and bought another 7 new pens. In the end, Ivan had 21 pens.
  1. How many pens did Ivan give to his cousin?
  2. How many pens did Ivan have at first?
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

Ivan had some pens. He gave 56 of his pens to Valen and bought 4 new pens. After that, he gave 35 of his remaining pens to his cousin and bought another 7 new pens. In the end, Ivan had 21 pens.
  1. How many pens did Ivan give to his cousin?
  2. How many pens did Ivan have at first?