Roshel has 6 marbles fewer than Erika but 16 marbles more than Ivan. The three children have 236 marbles altogether.
- How many marbles does Ivan have?
- How many marbles does Erika have?
(a)
Number of marbles Erika has = 1 u
Number of marbles Roshel has = 1 u - 6
Number of marbles Ivan has = 1 u - 6 - 16 = 1 u - 22
Total number of marbles
= 1 u + 1 u - 6 + 1 u - 22
= 3 u - 28
3 u - 28 = 236
3 u = 236 + 28
3 u = 264
1 u = 264 ÷ 3 = 88
Number of marbles that Ivan has
= 1 u - 22
= 88 - 22
= 66
(b)
Number of marbles that Erika has
= 1 u
= 88
Answer(s): (a) 66; (b) 88
