# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 885 - 890 of 919

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## Question number: 885

MCQ▾

### Question

If PAPER = 56 and UNCLE = 55, then WORKBOOK=?

### Choices

Choice (4) Response

a.

115

b.

105

c.

100

d.

110

## Question number: 886

MCQ▾

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 887

MCQ▾

### Question

Eight people are planning to share equally the cost of a rental car. If one person withdraws from the arrangement and the others share equally the entire rental of the car, then the share of each of the remaining persons is increased by ________ of the original share.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 888

MCQ▾

### Question

The number of positive integers k for which the equation has an integer solution for x is ________

### Choices

Choice (4) Response

a.

0

b.

1

c.

-1

d.

2

## Question number: 889

MCQ▾

### Question

A box contains 12 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 6 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.

3

b.

7

c.

5

d.

2

## Question number: 890

MCQ▾

### Question

Two angles are complementary. The measure of one angle is 15˚ more than twice the other. What is the measure of the smaller angle?

### Choices

Choice (4) Response

a.

25˚

b.

35˚

c.

55˚

d.

65˚