Some stickers are packed into exactly packets of 18.
If the stickers are repacked into packets of 8,
there are 6 more packets and 2 stickers left.
- How many packets are there?
- How many stickers are there?
|
Packets of 18 |
Packets of 8 |
Number |
1 u |
1 u + 6 |
Value |
18 |
8 |
Total value |
18 u |
8(1 u + 6) + 2 = 8 u + 50 |
(a)
Let the number of packets of 18 be 1 u.
Number of stickers if they are in packets of 18
= 1 u x 18
= 18 u
Number of stickers if they are in packets of 8
= 8 x (1 u + 6) + 2
= 8 u + 48 + 2
= 8 u + 50
18 u = 8 u + 50
18 u - 8 u = 50
10 u = 50
1 u = 50 ÷ 10 = 5
Number of packets of 18
= 1 u
= 5
(b)
Number of stickers
= 18 u
= 18 x 5
= 90
Answer(s): (a) 5; (b) 90