1. A box has 210 coins of denominations one-rupee and fifty paise only. The ratio of their respective values is 13: 11. The number of one-rupee coins is
(1) 65 (2) 66
2. The total marks obtained by Arun in English and Mathematics are 170. If the difference between his marks in these two subjects is 10, then the ratio of his marks in these subject is
(1) 7: 8 (2) 8 : 7
(3) 9 : 8 (4) 9 : 7
3. The bus fare and train fare of a place from Kolkata were Rs. 20 and Rs. 30 respectively. Train fare has been increased by 20% and the bus fare has been increased by 10%. The ratio of new train fare to new bus fare is:
(1) 11: 18 (2) 18: 11
(3) 5 : 3 (4) 3 : 5
4. In a bag, there are three types of coins – 1- rupee, 50 paise and 25 – paise in the ratio of 3 : 8 : 20. Their total value is Rs. 372. The total number of coins is
(1) 1200 (2) 961
(3) 744 (4) 612
5. the ratio of two numbers is 4: 5 when the first is increased by 20% and the second is decreased by 20%, the ratio of the resulting number is :
(1) 4: 5 (2) 5 :4
(3) 5 : 6 (4) 6 : 5
6. The radii of the bases of two cylinders are in the ratio 3:5 and their heights in the ratio 2:3. The ratio of their curved surfaces will be:
(1) 2 : 5 (2) 2 : 3
(3) 3 : 5 (4) 5 : 3
7. Two numbers are in the ratio 4 : 5 and their L.C.M. is 180. The smaller number is
(1) 9 (2) 15
(3) 36 (4) 45
8. If A : B = 2 : 3, B : C = 4 : 5 and C : D = 5 : 9, then A : D is equal to
(1) 11 : 17 (2) 8 : 27
(3) 5 : 9 (4) 2 : 9
9. If a + b + c = 1 and ab + bc + ca = 1/3 then a : b: c is
(1) 1 : 2 : 2 (2) 2 : 1 : 2
(3) 1 : 1 : 1 (4) 1 : 2 : 1
10. If 20% of A = 30 % of B = 1/6 of C, then A : B : C is
(1) 2 : 3 : 6 (2) 3: 2 : 16
(3) 10 : 15 : 18 (4) 15 : 10 : 18
ANSWERS:
1. | 4 |
2. | 3 |
3. | 2 |
4. | 2 |
5. | 4 |
6. | 1 |
7. | 3 |
8. | 2 |
9. | 3 |
10. | 4 |
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