Adam has 475 red beads.
He has 5 times as many red beads than blue beads.
After he gives away an equal number of red and blue beads,
the number of red beads is 6 times that of the blue beads.
- How many red beads are there in the end?
- How many blue beads are there in the end?
- How many beads are there in the end?
- How many beads does Adam give away?
|
Red beads |
Blue beads |
Difference |
Before |
5 x 5 = 25 u |
1 x 5 = 5 u |
4 x 5 = 20 u |
Change |
- ? |
- ? |
|
After |
6 x 4 = 24 u |
1 x 4 = 4 u |
5 x 4 = 20 u |
(a)
The difference in the number between the red and blue beads at first and in the end remains unchanged.
LCM of 4 and 5 is 20.
25 u = 475
1 u = 475 ÷ 25 = 19
Number of red beads in the end
= 24 u
= 24 x 19
= 456
(b)
Number of blue beads in the end
= 4 u
= 4 x 19
= 76
(c)
Total number of beads in the end
= 456 + 76
= 532
(d)
Total number of beads that Adam gives away
= (25 u - 24 u) x 2
= 1 u x 2
= 2 u
= 2 x 19
= 38
Answer(s): (a) 456; (b) 76; (c) 532; (d) 38