If each cow produces 28 liters of milk every week, how many cows are needed to produce 180 liters of milk in 15 days?

A) 5

B) 4

C) 3

D) 2

If the duplicate ratio of a:b is (a+x):(b+x), what is the value of x?

A) \$x = ab/(a - b)\$

B) \$x = - ab/(a - b)\$

C) \$x = ab/(a + b)\$

D) \$x = - ab/(a + b)\$

Given that a man travels a long journey using train, bus, and rickshaw in the ratio 8:9:5, and the corresponding fares are in the ratio 4:6:3. The total expenditure for the journey is 808 units. What was the expenditure specifically on the bus?

A) 324

B) 432

C) 234

D) 423

Find the compound ratio involving the duplicate ratio of 7:8, the reciprocal ratio of 12:10, and the sub-triplicate ratio of 216:512?

A) 245 : 512

B) 254 : 521

C) 512 : 245

D) 245 : 521

What is the sum of all the two-digit natural numbers for which the ratio of the number to the number formed by reversing its digits is 6 : 5?

A) 287

B) 278

C) 827

D) 782

Find the value of y when x=350 using the inverse proportion formula, given that x and y are inversely proportional and when x=240, y = 10?

A) 5.4

B) 6.8

C) 7.6

D) 8.6

Given the scale of a map is 2 : 8000 and places A and B are 5 cm apart on the map, what is the actual distance between A and B? If places C and D are 2200 km apart in reality.

A) 25700 cm

B) 27500 cm

C) 2750 cm

D) 27500 m

If the ratio of x to y is 6 : 4, what is the ratio of \$x^3 + y^3\$ to \$x^3 − y^3\$?

A) 19 : 35

B) 34 : 15

C) 35 : 19

D) 15 : 34

A and B together have Rs. 1420. If 156​ of A’s amount equals 53​ of B’s amount, how much money does A have?

A) Rs. 658

B) Rs. 582

C) Rs. 852

D) Rs. 825

If Rs. 1104 is divided into three parts in the ratio \$1/2 ​: 2/3 ​: 3/4\$​, what are the amounts of the three parts?

A) Rs. 288
Rs. 432
Rs. 384

B) Rs. 432
Rs. 384
Rs. 288

C) Rs. 384
Rs. 288
Rs. 432

D) Rs. 288
Rs. 384
Rs. 432