# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 841 - 847 of 931

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## Question 841

### Question

MCQ▾

If and , then value of is________.

### Choices

Choice (4)Response

a.

770

b.

555

c.

227

d.

115

## Question 842

### Question

MCQ▾

The median of the observation 2, 1, 12, 29, 25, 12,10, 4,5 is ________

### Choices

Choice (4)Response

a.

15

b.

12

c.

10

d.

25

## Question 843

### Question

MCQ▾

A man purchased two clocks P and Q at a total cost ₹ 800. He sells P at profit and Q at a loss of and gets the same selling price for both the clocks. What are the purchasing prices of P and Q respectively?

### Choices

Choice (4)Response

a.

₹ 275, ₹ 425

b.

₹ 266.67, ₹ 533.33

c.

₹ 250.65, ₹ 200.22

d.

₹ 360, ₹ 850

## Question 844

### Question

MCQ▾

The mean of 24 observations is 35. If the mean of the first 12 observations is 31 and that of the last 12 observations is 38, then the 12th observation is ________

### Choices

Choice (4)Response

a.

15

b.

11

c.

14

d.

12

## Question 845

### Question

MCQ▾

Choose the correct alternative that will continue the same pattern. 6, 11, 21,36, 56, (…)

### Choices

Choice (4)Response

a.

91

b.

42

c.

81

d.

51

## Question 846

### Question

MCQ▾

Which equation satisfies the data in the table?

 X 3 5 7 9 Y 2 4 6 8

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 847

MCQ▾

Factors of

### Choices

Choice (4)Response

a.

b.

c.

d.