Zara and Barbara have 500 beads altogether. Barbara has thrice as many beads as Zara. How many beads must Barbara give to Zara so that they have the same number of beads?
| |
Zara |
Barbara |
Total |
| Before |
1 u |
3 u |
500 |
| Change |
+ ? |
- ? |
|
| After |
250 |
250 |
500 |
Total number of beads that Zara and Barbara have
= 1 u + 3 u
= 4 u
4 u = 500
1 u = 500 ÷ 4 = 125
Number of beads that Zara and Barbara each has in the end
= 500 ÷ 2
= 250
Number of beads that Barbara must give to Zara
= 250 - 125
= 125
Answer(s): 125
