3 children have a total of 1500 stickers.
Adam has 3 times as many stickers as Charlie.
Bryan has 200 stickers more stickers than Charlie.

1. How many stickers do Adam and Charlie have?
2. How many stickers does Charlie have less than Adam?
3. How many stickers does Charlie have less than Adam and Bryan?

(a)
Choose the person with least stickers to be 1 u.

Number of stickers that Charlie has = 1 u
Number of stickers that Adam has = 3 u = 3 u
Number of stickers that Bryan has = 1 u + 200

Total number of stickers
= 1 u + 3 u + 1 u + 200
= 5 u + 200

5 u + 200 = 1500
5 u = 1500 - 200
5 u = 1300

1 u = 1300 ÷ 5 = 260

Number of stickers that Adam and Charlie have
= 3 u + 1 u
= 4 u
= 4 x 260
= 1040

(b)
Number of stickers that Charlie has less than Adam
= 3 u - 1u
= 2 u
= 2 x 260
= 520

(c)
Number of stickers that Charlie has less than Adam and Bryan
= (3 u + 1 u + 200) - 1 u
= 3 u + 200
= 3 x 260 + 200
= 780 + 200
= 980

Answer(s); (a) 1040; (b) 520; (c) 980