october feedback quant (maths)

8s + 2t = x

t + 4s = -1


If there are an infinite number of real-valued solutions for s and t, what must be the value of x?

a) t
b) s
c) -1
d) -2
e) None of These

A number is selected at random from first thirty natural numbers. What is the chance that it is a multiple of either 3 or 13?

A. 17/30
B. 2/5
C. 11/30
D. 4/15

What is the greatest positive integer n, such that 2^n is a factor of 12^10?

a. 10
b. 12
c. 16
d. 20
e. 60

In a certain country, a person is born every 3 seconds and a person dies every 10 seconds. Therefore, the birth and death rates account for a population growth of one person every
a. 3 1/3 sec
b. 4 2/7 sec
c. 7 sec
d. 11 2/3 sec
e. 13 sec

Ans:B

A merchant buys two articles for Rs.600. He sells one of them at a profit of 22% and the other at a loss of 8% and makes no profit or loss in the end. What is the selling price of the article that he sold at a loss?

A. Rs. 404.80
B. Rs. 440
C. Rs. 536.80
D. Rs. 160
E. Rs. 153.60

Column A: Sum of the areas of two triangles on the same base of length 3 cm and with heights 1.5 cm and 12 cm.

Column B: Area of a triangle with base 9 cm and height 9 cm minus the sum of the areas of the two triangles given in A.


Choose:

A. if the quantity in column A is greater

B. if the quantity in column B is greater

C. if the quantities are equal

D. if the relationship cannot be determined from the information given

At a party there were 5 times as many as males. There were 3 times as many adults as children. Which of the following could not be the number of people at the party?

a. 384
b. 258
c. 216
d. 120
e. 72

Six points lie on a circle. How many quadrilaterals can be drawn joining these points?


A. 72
B. 36
C. 48
D. 15
E. 120