# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 549 - 552 of 931

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## Question 549

### Question

MCQ▾

Bhavesh started from his house towards North. After covering a distance of 8 km. he turned towards left and covered a distance of 6 km. what is the shortest distance now from his house?

### Choices

Choice (4)Response

a.

10 km

b.

2 km

c.

15 km

d.

16 km

## Question 550

### Question

MCQ▾

The average of 15 numbers is calculated as 20. It is discovered later on that while calculating the average one number, namely 41 was wrongly read as 31. The correct average is________

### Choices

Choice (4)Response

a.

19.5

b.

13.5

c.

20.6

d.

16.5

## Question 551

### Question

MCQ▾

In Arun՚s opinion, his weight is greater than 65 kg but less than 72 kg. His brother does not agree with Arun and he thinks that Arun՚s weight is greater than 60 kg but less than 70 kg. His mother՚s view is that his weight cannot be greater than 68 kg. If all of them are correct in their estimations, what is the average of different probable weights of Arun?

### Choices

Choice (4)Response

a.

69 kg

b.

67 kg

c.

68 kg

d.

Question does not provide sufficient data or is vague

## Question 552

### Question

MCQ▾

If stands for , stands for , stands for , stands for , stands for , stands for .

Which one of the following expression is not true?

### Choices

Choice (4)Response

a.

b.

c.

d.