3 children have a total of 1800 stickers.
Bryan has 3 times as many stickers as Adam.
Charlie has 100 stickers more stickers than Adam.
- How many stickers do Bryan and Adam have?
- How many stickers does Adam have less than Bryan?
- How many stickers does Adam have less than Bryan and Charlie?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Adam has = 1 u
Number of stickers that Bryan has = 3 u = 3 u
Number of stickers that Charlie has = 1 u + 100
Total number of stickers
= 1 u + 3 u + 1 u + 100
= 5 u + 100
5 u + 100 = 1800
5 u = 1800 - 100
5 u = 1700
1 u = 1700 ÷ 5 = 340
Number of stickers that Bryan and Adam have
= 3 u + 1 u
= 4 u
= 4 x 340
= 1360
(b)
Number of stickers that Adam has less than Bryan
= 3 u - 1u
= 2 u
= 2 x 340
= 680
(c)
Number of stickers that Adam has less than Bryan and Charlie
= (3 u + 1 u + 100) - 1 u
= 3 u + 100
= 3 x 340 + 100
= 1020 + 100
= 1120
Answer(s); (a) 1360; (b) 680; (c) 1120