# IMO- Mathematics Olympiad Class 9: Questions 575 - 581 of 919

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## Question number: 575

MCQ▾

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 576

MCQ▾

### Question

Find the remainder when is divided by .

### Choices

Choice (4) Response

a.

2

b.

3

c.

-3

d.

-2

## Question number: 577

MCQ▾

### Question

If the mean of 20 observations is 25 and that of another 5 observations is 14, then the mean of 25 observations is ________

### Choices

Choice (4) Response

a.

22.8

b.

22

c.

15

d.

15.5

## Question number: 578

MCQ▾

### Question

If and , then value of is________.

### Choices

Choice (4) Response

a.

1885

b.

1890

c.

1895

d.

1880

## Question number: 579

MCQ▾

### Question

A man purchases an blander whose printed price is Rs. 2200. If he received two successive discounts of and, he paid________

### Choices

Choice (4) Response

a.

Rs. 1121

b.

Rs. 1132

c.

Rs. 1221

d.

Rs. 1232

## Question number: 580

MCQ▾

### Question

If , then values of x are________

### Choices

Choice (4) Response

a.

x=-1 and x=-3

b.

x = 1 and x = 5

c.

x = 5 and x=-1

d.

x = 2 and x = 3

## Question number: 581

MCQ▾

### Question

Group the given figures into three classes using each figure only once.

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page