Page 71 - Mathematics

Exercise 4.1 2. Complete each of the following ratios.

(a) 25: = 5:6
1. Express each of the
following ratios in its (b) 15: 20 18:=
lowest form. (c) 24:8 = :7

(a) 8:12 (d)30:6 = :9 Tanzania Institute of Education
(b) 40 :50 (e) 4:7 = 20:

(c) 100 :50 (f) 4:9 = :63
(d) 77 :35 (g) 12: = 3:7

(e) 48:36 (h) :8 = 21: 24

(f) 160 :96 3. A herd of 52 horses consists of white
(g) 144:81 and black horses. If it contains 12
white horses, find the ratio of white
1 1
(h) 3 :1 horses to black horses.
2 4 4. The ratio of girls to boys in a swimming

1 club was 2: 4. If 14 members were
(i) 14:
2 girls, how many members were there
in the club?
1 1
(j) 1 : 2 5. If 4M = 5N = 6P, find M : N : P.
2 2
6. Find A : B:C, when:
11
(k) : (a) A : B 3:5= and A :C 6:7=
47

2 3 11 11
:
(l) :1 (b) B: C= : and A :B=
5 5 26 35
(m) 0.17 :1 7. David, Amina, and Nuru shared some
oranges. The ratio of the number of
(n) 3.5: 0.07 oranges received by David and Amina

(o) 7 :0.007 was 7:3. The number of oranges
(p) 120 :105 David received to that of Nuru was
in the ratio 4:5. If Nuru received
(q) Tshs 136 to Tshs 4
21 more oranges than David, find
(r) 50 s to 90 s the number of oranges that Amina Mathematics Form One
(s) 0.75 km to 0.5 km received.

(t) 120 km to 105 km

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Mathematics form 1.indd 65