Sam had some marbles. He gave
78 of his marbles to Andy and bought 4 new marbles. After that, he gave
49 of his remaining marbles to his sister and bought another 7 new marbles. In the end, Sam had 22 marbles.
- How many marbles did Sam give to his sister?
- How many marbles did Sam have at first?
(a)
Fraction of his remaining marbles after he gave to his sister
= 1 -
49=
59 59 of his remaining marbles = 22 - 7 = 15
19 of his remaining marbles = 15 ÷ 5 = 3
49 of his remaining marbles = 4 x 3 = 12
Number of marbles that Sam gave to his sister = 12
(b)
99 of his remaining marbles = 9 x 3 = 27
Fraction of his total marbles after he gave to Andy
= 1 -
78=
18 18 of his total marbles = 27 - 4 = 23
88 of his total marbles = 8 x 23 = 184
Number of marbles that Sam had at first = 184
Answer(s): (a) 12; (b) 184