# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 664 - 670 of 929

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## Question number: 664

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MCQ▾

### Question

In the figure 3x = 90˚, then ∠ROS is________ Find the Value of Angle ROS Different angles are given and find the ∠ros.

### Choices

Choice (4) Response

a.

120˚

b.

150˚

c.

130˚

d.

140˚

## Question number: 665

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MCQ▾

### Question

The compound interest on Rs. 80000 at per annum for 9 months, compound quarterly is ________

### Choices

Choice (4) Response

a.

Rs. 14610

b.

Rs. 12610

c.

Rs. 15610

d.

Rs. 13610

## Question number: 666

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MCQ▾

If, then =

### Choices

Choice (4) Response

a.

2

b.

1

c.

3

d.

0

## Question number: 667

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MCQ▾

### Question

A man rows downstream 30 km and upstream 18 km, taking 5 hours each time. The velocity of current is ________

### Choices

Choice (4) Response

a.

1.2 km/hr

b.

6 km/hr

c.

3.6 km/hr

d.

2.4 km/hr

## Question number: 668

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MCQ▾

### Question

According to Euclid, a point has________

### Choices

Choice (4) Response

a.

b.

No Length but breadth and thickness

c.

Length and breadth but no thickness

d.

No length, no breadth and no thickness

## Question number: 669

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MCQ▾

### Question

The number of values of k for which the system of equations , has the solutions?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 670

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MCQ▾

### Question

Which of the following pairs of equations have the same solution

### Choices

Choice (4) Response

a.

b.

c.

d.