MATH READINESS 9 & 10

The ratio of two positive numbers is 4:7. If the difference of the numbers is 15, what is the larger number?

• 20

• 25

• 30

• 35

The sum of five times the first number and two times the second number is equal to twice the difference of thrice of the first number and twice the second. What is the ratio of the two numbers?

• 1 : 6

• 6 : 1

• 2:1

• 3:4

If 60 men do a piece of work in 27 days, then in how many days can 18 men do the same work?

• 100 days

• 90 days

• 60 days

• 95 days

Two number are in the ratio 4 : 5. If 15 is subtracted from each, the new numbers are in the ratio 5 : 7. What is the largest between the two numbers?

• 27

• 33

• 49

• 50

If a : b = 2 : 3, then find (3a – b) / (5a – 2b)

• 2/7

• 1/7

• 3/7

• 7/3

Area of circle varies as the square of its radius. Given that the area of the circle is 154 sq units, when the radius is 7 units. What is the area of the circle in sq. Units when the radius is 3.5units?

• 77

• 38.5

• 75

• 65

X varies inversely as square of Y. Given that y = 2 for x = 1. The value of x for y = 6 will be equal to:

• 3

• 9

• 1/3

• 1/9

Answer explanation

x = -1, 3

Answer explanation

r = 36/5

Answer explanation

k = 73/3