# IMO- Mathematics Olympiad Class 9: Questions 688 - 694 of 919

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## Question number: 688

MCQ▾

### Question

Average weight of 9 persons is 48 kg. If one man weighing 32 kg, died, what is an average age of the remaining 8 persons.

### Choices

Choice (4) Response

a.

50

b.

52

c.

54

d.

56

## Question number: 689

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 690

MCQ▾

### Question

A card is drawn at random from a well shuffled pack of 52 cards. The probability that the ‘9’ of red color card is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 691

MCQ▾

=

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 692

MCQ▾

### Question

If and , then value of y when , is________.

### Choices

Choice (4) Response

a.

-2

b.

2

c.

-1

d.

1

## Passage

A Train is going on a long journey for 20 hours, starting at 3.00 hrs. The speed of the car at different hours is given below:

 Time (in hrs): 3 5 8 10 12 15 18 20 23 Speed (in km/hour): 60 70 90 50 60 75 60 30 60

From the above table answer the following questions.

## Question number: 693 (1 of 3 Based on Passage) Show Passage

MCQ▾

### Question

The percentage of increase in speed during 10.00 hrs and 12.00 hrs is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 694 (2 of 3 Based on Passage) Show Passage

MCQ▾

### Question

The average speed (in km/hour) between 10.00 hrs, 12.00 hrs and 15.00 hrs is ________

### Choices

Choice (4) Response

a.

62

b.

63

c.

68

d.

57

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