Pair of Linear Equations in Two Variables (IMO- Mathematics Olympiad Class 10): Questions 69 - 73 of 82

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Question number: 69

» Pair of Linear Equations in Two Variables

MCQ▾

Question

The value of k for which the system of equations 3x+5y=20 , 6x+ky=10 has infinite number of solutions, is ________

Choices

Choice (4) Response

a.

50

b.

60

c.

10

d.

20

Question number: 70

» Pair of Linear Equations in Two Variables

MCQ▾

Question

In a PQR,R=5P=4(P+Q) the three angles will be ________

Choices

Choice (4) Response

a.

28.8°,7.2°,144°

b.

20°,40°,120°

c.

100°,30°,50°

d.

25°,10°,145°

Question number: 71

» Pair of Linear Equations in Two Variables

MCQ▾

Question

The solution of the system of equations 13x+15yxy=16 and 14x15yxy+13=0(wherex0,y0) , is ________

Choices

Choice (4) Response

a.

x=1.03,y=9

b.

x=1.03,y=9

c.

x=1.03,y=9

d.

x=1.03,y=9

Question number: 72

» Pair of Linear Equations in Two Variables

MCQ▾

Question

The solution of the system of equations 3x+7yxy=10 and 6x7yxy+7=0(wherex0,y0) , is ________

Choices

Choice (4) Response

a.

x=1,y=2

b.

x=0.78,y=3

c.

x=0.78,y=3

d.

x=4,y=2.5

Question number: 73

» Pair of Linear Equations in Two Variables

MCQ▾

Question

If the system of equations 2x+3y=7,2ax+(a+b)y=28 has infinitely many solutions, then________

Choices

Choice (4) Response

a.

a=2b

b.

b=2a

c.

a+2b=0

d.

2a+b=0

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