Sam had
16 as many buttons as Tommy. Tommy had twice as many buttons as Japheth. If Sam had 42 buttons fewer than Japheth,
- how many buttons did Sam have?
- how many buttons did they have altogether?
(a)
Number of buttons that Sam had = 1 u
Number of buttons that Tommy had = 6 u
Number of buttons that Japheth had = 6 u ÷ 2 = 3 u
Number of buttons that Sam had fewer than Japheth
= 3 u - 1 u
= 2 u
2 u = 42
1 u = 42 ÷ 2 = 21
Number of buttons that Sam had
= 1 u
= 21
(b)
Total number of buttons that they had
= 1 u + 6 u + 3 u
= 10 u
= 10 x 21
= 210
Answer(s): (a) 21; (b) 210
