# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 282 - 286 of 929

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## Question number: 282

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MCQ▾

### Question

In the medians XC, YB and ZA pass through O. If , then YB is ________ Given the Triangle XYZ the Medians XC, YB and ZA Pass through O Given the triangle XYZ the medians XC, YB and ZA pass through O. if YO = 14, then find YB

### Choices

Choice (4) Response

a.

19

b.

21

c.

26

d.

11

## Question number: 283

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MCQ▾

### Question

In the figure , and . If the exterior angle XZK is, then the angle NMX is ________ Given XY = YZ, XM = XZ and MN is Parallel to XY Exterior Angle XZK Given XY = YZ, XM = XZ and MN is parallel to XY. If the exterior angle XZK is 144 find the angle NMX

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 284

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MCQ▾

### Question

The number of spherical balls each 4 cm in diameter be made out of a rectangular solid is ________

### Choices

Choice (4) Response

a.

107

b.

105

c.

102

d.

109

## Question number: 285

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MCQ▾

### Question

The ratio between the perimeter and breadth of rectangle is. If the area of the rectangle is 116 sq. cm. then length of the rectangle is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 286

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MCQ▾

### Question

The and are right angles. If , and , then the length of BD is ________ Given the ABC and BDC Are Right Angles Given the ABC and BDC are right angles, Ad is 9 cm, DC is 16 cm and AB is 15 cm, then Find the length of BD

### Choices

Choice (4) Response

a.

16 cm

b.

15 cm

c.

12 cm

d.

25 cm