IMO- Mathematics Olympiad Class 10: Questions 238 - 242 of 889

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Question number: 238

» Pair of Linear Equations in Two Variables

MCQ▾

Question

The equations representing the given graph is ________

Points in graph for different points

Points in Graph for Different Points

Given the points in graph for different points and find the equations

Choices

Choice (4) Response

a.

12x+17y=21;5x+y=30

b.

17x+12y=11;4y5x=13

c.

6x7y=3;yx=9

d.

xy=4;7y8x=3

Question number: 239

» Pair of Linear Equations in Two Variables

MCQ▾

Question

A boat goes 20 km upstream and 33 km downstream in 10 hours. In 13 hours, it can go 30 km upstream and 44 km downstream. If x represents the speed of the boat in still water in km/hr and y represent the speed of the stream in km/hr, then ________

Choices

Choice (4) Response

a.

3x+3y=15,x3y=6

b.

8x+9y=11,x+2y=20

c.

2x+6y=15,3x2y=32

d.

4x+4y=11,x+y=10

Question number: 240

» Polynomials

MCQ▾

Question

The difference of roots of the quadratic equation 6y2+7y+2=0 is ________

Choices

Choice (4) Response

a.

16

b.

16

c.

6

d.

-6

Question number: 241

» Quadratic Equations

MCQ▾

Question

Which of the statements given below is correct. If discriminant for equation x22x=6x16 is D________

Choices

Choice (4) Response

a.

D>4

b.

D=4

c.

D<4

d.

Question does not provide sufficient data or is vague

Question number: 242

» Quadratic Equations

MCQ▾

Question

If the equation 25x2+5kx+4=0 has equal roots, and then the both roots are equal to ________

Choices

Choice (4) Response

a.

±2

b.

±52

c.

±25

d.

±5

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