Simon had some pens. He gave
34 of his pens to Luke and bought 4 new pens. After that, he gave
25 of his remaining pens to his sister and bought another 7 new pens. In the end, Simon had 22 pens.
- How many pens did Simon give to his sister?
- How many pens did Simon have at first?
(a)
Fraction of his remaining pens after he gave to his sister
= 1 -
25=
35 35 of his remaining pens = 22 - 7 = 15
15 of his remaining pens = 15 ÷ 3 = 5
25 of his remaining pens = 2 x 5 = 10
Number of pens that Simon gave to his sister = 10
(b)
55 of his remaining pens = 5 x 5 = 25
Fraction of his total pens after he gave to Luke
= 1 -
34=
14 14 of his total pens = 25 - 4 = 21
44 of his total pens = 4 x 21 = 84
Number of pens that Simon had at first = 84
Answer(s): (a) 10; (b) 84
