# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 282 - 288 of 931

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## Question 282

Edit

### Question

MCQ▾

In the medians XC, YB and ZA pass through O. If, then YB is ________

### Choices

Choice (4)Response
a.19
b.21
c.26
d.11

## Question 283

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### Question

MCQ▾

In the figure , and. If the exterior angle XZK is, then the angle NMX is ________

### Choices

Choice (4)Response
a.
b.
c.
d.

## Question 284

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### Question

MCQ▾

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 285

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### Question

MCQ▾

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 286

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### Question

MCQ▾

The and are right angles. If, and, then the length of BD is ________

### Choices

Choice (4)Response
a.16 cm
b.15 cm
c.12 cm
d.25 cm

## Question 287

Edit

### Question

MCQ▾

The volume of a sphere is the curved surface of its sphere is ________

### Choices

Choice (4)Response
a.
b.
c.
d.

## Question 288

Edit

### Question

MCQ▾

The area of trapezium ABCD is ________

### Choices

Choice (4)Response
a.
b.
c.
d.