3 cousins share some stickers.
Charlie has 20 more than Bryan.
Bryan has 2 times as many as Adam.
Charlie and Bryan have 500 more than Adam.
- How many stickers does Bryan have?
- How many stickers does Charlie have?
- How many stickers do Charlie and Adam have?
Choose the person with least stickers to be 1 u.
Number of stickers that Adam has = 1 u
Number of stickers that Bryan has = 2 u
Number of stickers that Charlie has = 2 u + 20
Number of stickers that Charlie and Bryan have is 500 more than Adam.
Number
of stickers that Charlie and Bryan have = 1 u + 500 2 u + 20 + 2 u = 1 u + 500 4 u - 1 u = 500 - 20 3 u = 480
1 u = 480 ÷ 3 = 160 (a)
Number of stickers that Bryan has
= 2 x 160
= 320
(b)
Number of stickers that Charlie has
= 2 u + 20
= 2 × 160 + 20
= 320 + 20
= 340
(c)
Number of stickers that Charlie and Adam have
= 2 u + 20 + 1 u
= 340 + 160
= 500
Answer(s): (a) 320; (b) 340; (c) 500