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.
- How many pens did Ivan give to his cousin?
- How many pens did Ivan have at first?
(a)
Fraction of his remaining pens after he gave to his cousin
= 1 -
35=
25 25 of his remaining pens = 21 - 7 = 14
15 of his remaining pens = 14 ÷ 2 = 7
35 of his remaining pens = 3 x 7 = 21
Number of pens that Ivan gave to his cousin = 21
(b)
55 of his remaining pens = 5 x 7 = 35
Fraction of his total pens after he gave to Valen
= 1 -
56=
16 16 of his total pens = 35 - 4 = 31
66 of his total pens = 6 x 31 = 186
Number of pens that Ivan had at first = 186
Answer(s): (a) 21; (b) 186