# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 822 - 827 of 931

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## Question 822

### Question

MCQ▾

Tea worth ₹ 126 per kg and ₹ 135 per kg are mixed with a third variety in the ratio . If the mixture is worth ₹ 153 per kg, the price of the third variety per kg will be

### Choices

Choice (4)Response

a.

₹ 169.50

b.

₹ 180

c.

₹ 175.50

d.

₹ 170

## Question 823

MCQ▾

Factors of

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 824

### Question

MCQ▾

If 3 is added to the denominator of a fraction, the fraction becomes 6. If 4 is added to the numerator, the fraction becomes 30, the fraction is ________.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 825

### Question

MCQ▾

A box contains 8 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball? If 4 more black balls are put in the box, the probability of drawing a black ball is now double of what is was before, then x is________

### Choices

Choice (4)Response

a.

6

b.

3

c.

9

d.

2

## Question 826

### Question

MCQ▾

The option which is not a solution of the equation , is________

### Choices

Choice (4)Response

a.

(3,0)

b.

(0,2)

c.

(-3,4)

d.

(1,1)

## Question 827

### Question

MCQ▾

How many circles are there in the adjoining figure

### Choices

Choice (4)Response

a.

17

b.

14

c.

16

d.

15