# IMO Level 1- Mathematics Olympiad (SOF) Class 10: Questions 501 - 505 of 968

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## Question number: 501

Edit
MCQ▾

### Question

In the adjacent figure, QP and QR are produced to meet RS and PS produced in T and U. then is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 502

Edit
MCQ▾

### Question

The mean of 10 observations is. By error, one observation was noted as was misread as 24. Then the correct mean is ________

### Choices

Choice (4) Response

a.

23

b.

21

c.

25

d.

27

## Question number: 503

Edit
MCQ▾

### Question

The distance between the points and is ________

### Choices

Choice (4) Response

a.

2a

b.

3a

c.

a

d.

5a

## Question number: 504

Edit
MCQ▾

### Question

A drawer contains 8 red socks, 12 white socks and 10 blue socks. Without looking you draw out a sock and then draw out a second sock without returning the first sock. What is the probability that the first sock and second sock are both white?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 505

Edit
MCQ▾

### Question

If 2 man or 3 women or 4 boys can do a piece of work in 60 days, then the same piece of work will be done by 1 man, 1 woman and 1 boy in ________

### Choices

Choice (4) Response

a.

50 days

b.

49 days

c.

52 days

d.

51 days

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