Bobby had some pens. He gave
23 of his pens to Tim and bought 4 new pens. After that, he gave
35 of his remaining pens to his brother and bought another 7 new pens. In the end, Bobby had 29 pens.
- How many pens did Bobby give to his brother?
- How many pens did Bobby have at first?
(a)
Fraction of his remaining pens after he gave to his brother
= 1 -
35=
25 25 of his remaining pens = 29 - 7 = 22
15 of his remaining pens = 22 ÷ 2 = 11
35 of his remaining pens = 3 x 11 = 33
Number of pens that Bobby gave to his brother = 33
(b)
55 of his remaining pens = 5 x 11 = 55
Fraction of his total pens after he gave to Tim
= 1 -
23=
13 13 of his total pens = 55 - 4 = 51
33 of his total pens = 3 x 51 = 153
Number of pens that Bobby had at first = 153
Answer(s): (a) 33; (b) 153
