# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 924 - 931 of 931

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## Question 924

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### Question

MCQ▾

The measures of two complementary angles are represented by . What is the value of x?

### Choices

Choice (4)Response
a.20
b.10
c.40
d.30

## Question 925

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### Question

MCQ▾

A cloth merchant has announced 20 % rebate in prices. If one needs to have a rebate of Rs. 400, then now many shirts each costing Rs. 800, he should purchase?

### Choices

Choice (4)Response
a.30
b.40
c.20
d.10

## Question 926

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### Question

MCQ▾

If the perimeter of a rectangular garden plot is 400 meters. The length of a rectangular field is thrice its breadth, what is the length of field?

### Choices

Choice (4)Response
a.145 m
b.125 m
c.100 m
d.150 m

## Question 927

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### Question

MCQ▾

The value of is ________.

### Choices

Choice (4)Response
a.
b.
c.5
d.

## Question 928

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### Question

MCQ▾

Two points with coordinate (2,3), (6,3) and (-4,3) lie on a line, parallel to which axis?

### Choices

Choice (4)Response
a.Y-axis
b.X-axis
c.Z-axis
d.Question does not provide sufficient data or is vague

## Question 929

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### Question

MCQ▾

In the figure, the value of x if PQ|| RS, Also find x

### Choices

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

## Question 930

Edit

### Question

MCQ▾

Let a and b be real numbers such that , and Find

### Choices

Choice (4)Response
a.13
b.10
c.20
d.16

## Question 931

Edit

### Question

MCQ▾

Find all the natural number n such that is a perfect Square.

### Choices

Choice (4)Response
a.9
b.20
c.10
d.11