If the ratios A : B = 12 : 16, B : C = 48 : 60, and C : D = : 25 : 40 :, what is the combined ratio of A : B : C : D?

A) 3:5:6:2

B) 2:1:5:8

C) 3:4:5:9

D) 3:4:5:8

How many 2 rupees coins are there in the box, given that the total number of coins is 520 and the coins consist of 5 rupees, 2 rupees, and 1 rupee coins, with their total values in the ratio of 15:8:6 respectively?

A) 121

B) 160

C) 154

D) 180

At present, the father is 62 years old, and his son is 34 years old. Find the ratio of the father’s age to the son’s age when the father was 40 years old.

A) 11:3

B) 4:7

C) 10:3

D) 11:5

If a bus travels at 120 km/h and takes 4.5 hours to reach a destination, how long will it take for the bus to reach the same destination if it travels at 180 km/h?

A) 3 hours

B) 6 hours

C) 2 hours

D) 4 hours

In a distribution of money among A, B, C, and D in the ratio of 6 : 4 : 8 : 2, if B receives Rs. 2000 more than D, what amount does C receive?

A) Rs. 6500

B) Rs. 8000

C) Rs. 6000

D) Rs. 8500

The ratio of A’s and B’s salaries one year ago was 4:5. The ratio of A’s original salary to the increased salary is 3:2, and for B, it’s 2:1. The total present salary of A and B together is Rs. 27900. Find the salary of B.

A) Rs. 13500

B) Rs. 14500

C) Rs. 13000

D) Rs. 14000

The price of a silver biscuit is directly proportional to the square of its weight. A person breaks down the silver biscuit in the ratio of 3:2:1 and faces a loss of Rs 79200. Find the initial price of the silver biscuit.

A) 12900

B) 102960

C) 192600

D) 129600

Given that P is the mean proportion of 24 and 54, and Q is the third proportion of P and 36, find the fourth proportion of Q, 84, and 60.

A) 158

B) 162

C) 140

D) 135

What is the ratio between the Duplicate ratio and the Triplicate ratio of the numbers 12 and 16 that Dora needs to find?

A) 3 : 4

B) 4 : 3

C) 5 : 6

D) 6 : 5

If P and Q are inversely proportional such that Q∝P1​, and when P=16, Q=8, what is the value of Q when P=24?

A) 4.5

B) 2.5

C) 6.4

D) 5.3