# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 780 - 785 of 929

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## Question number: 780

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MCQ▾

### Question

A milk vendor has 2 cans of milk. The first contains water and the rest milk. The second contains water. How much milk should he mix from each of the containers so as to get 20 liters of milk such that the ratio of water to milk is ?

### Choices

Choice (4) Response

a.

14.71 liters, 5.29 liters

b.

4.12 liters, 8.52 liters

c.

5.12 liters, 17.52 liters

d.

17 liters, 15 liters

## Question number: 781

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MCQ▾

### Question

The simple interest on a sum of money at per annum for 6 years is half the sum. The sum is ________

### Choices

Choice (4) Response

a.

Rs. 8000

b.

Rs. 6000

c.

d.

Rs. 4800

## Question number: 782

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MCQ▾

### Question

Given that is a solution of . The other solutions are ________.

### Choices

Choice (4) Response

a.

b.

c.

5

d.

## Question number: 783

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MCQ▾

### Question

Cards marked with the numbers 2 to 101 are placed in a box and mixed thoroughly. One card is drawn from this bag. The probability that the number which is a perfect square is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 784

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MCQ▾

### Question

If a point R lies between two points P and Q such that PR = QR, then PR = ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 785

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MCQ▾

### Question

A shopkeeper earns a profit of on selling a book at discount on the printed price. The ratio of the cost price and the printed price of the book is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague