IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 277 - 281 of 931

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Question 277

Question

MCQ▾

In triangle HKM, the altitude from H to KM meets KM at J, and the altitude from K to HM meets HJ at S. if , and , if then the length of SJ is ________

Choices

Choice (4)Response

a.

b.

c.

d.

Question 278

Question

MCQ▾

On plotting the points A (3,6) , B (9,6) , C (5,8) , D (11,8) , E (11,3) , F (9,1) , G (3,1) and joining AB, AC, BD, CD, DE, BF, AG, EF, GF Which of the following figure is obtained?

Choices

Choice (4)Response

a.

Cube

b.

Teardrop

c.

Can

d.

Chord

Question 279

Question

MCQ▾

If the coordinate of the two points are A (-2,6) and B (-4,5) then (abscissa of A) - (abscissa of B) is ________

Choices

Choice (4)Response

a.

2

b.

1

c.

-1

d.

-2

Question 280

Question

MCQ▾

The ratio between the length and the breadth of a rectangular park is . If a man cycling along the boundary of the park at the speed of 15 km/hr completes one round in 12 minutes, then the area of the park is________

Choices

Choice (4)Response

a.

b.

c.

d.

Question 281

Question

MCQ▾

Two regular polygons are such that the ratio between their no. of sides is 1: 2 and the ratio of measures of their interior angles is 3: 4. Find the number of sides of each polygon.

Choices

Choice (4)Response

a.

b.

c.

d.