1. The compound ratio of \(ab:c^2\), \(bc:a^2\), and \(ca:b^2\) is 1:1.

2. The compound ratio of \(ab:c^2\), \(bc:a^2\), and \(ca:b^2\) is \(1:1\).

3. The compound ratio of \(ab : c^2\), \(bc : a^2\), and \(ca : b^2\) is \(1 : 1\).

4. The compound ratio of \( ab:c^2 \), \( bc:a^2 \), and \( ca:b^2 \) is 1:1.

5. If the compound ratio of \(2 : 3\), \(3 : 5\), and \(x : 8\) is \(1 : 4\), then what is the value of \(x\)?

(a) 3 (b) 4 (c) 5 (d) 6

6. What is the inverse (reciprocal) of the compound ratio of \(2 : 3\), \(4 : 5\), and \(6 : 7\)?

(a) 33:18 (b) 35:16 (c) 34:20 (d) 39:19

7. If the compound ratio of \(p^2 : qr\) and another ratio \(q^2 : pr\) is taken, then what is the resulting ratio?

(a) \(q^3:p^3\) (b) \(q:p\) (c) \(q^2:p^2\) (d) \(q^3:r^3\)

8. If the ratio of a certain principal amount to its compound amount after a certain period is 15:21 and the annual simple interest rate is 5%, then the duration of time is –

(a) 4 years (b) 2 years (c) 8 years (d) 10 years

9. The compound ratio of a:bc, b:ca, and c:ab is _____.

10. If the compound ratio of \(a:b\) and \(c:d\) is in its simplest form, then \(ac > bd\) will hold.

11. If the ratio of the principal and the annual compound amount is 10:11, then the annual interest rate is _____.

12. The continued proportion of \(2ab : c^2, bc : a^2,\) and \(ca : 2b^2\) is 1 : 1.

13. If a number is added to the antecedent and subtracted from the consequent of the ratio 4:7, the resulting ratio becomes equal to the compound ratio of 2:3 and 5:4.