# IMO Level 1- Mathematics Olympiad (SOF) Class 10: Questions 425 - 431 of 968

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## Question number: 425

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MCQ▾

### Question

In a , coordinates of J are and the equations of the medians through K and L is and respectively, so the coordinates of K and L are ________

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 426

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MCQ▾

### Question

The coordinates of the third vertex of an equilateral triangle whose two vertices are at are ________

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 427

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MCQ▾

### Question

The coordinates of the mid-points of the sides of a triangle are . What will be the coordinates of the centroid of the triangle?

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 428

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MCQ▾

### Question

The average of 15 results is 50. If the average of the first seven results is 82 and that of the last seven is 92, then the seventh result is ________

### Choices

Choice (4)Response

a.

488

b.

466

c.

468

d.

486

## Question number: 429

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MCQ▾

### Question

The average temperatures of Monday, Tuesday, Wednesday and Thursday was. The average temperature of Tuesday, Wednesday, Thursday and Friday was . If the temperature on Monday was, then the temperature on Friday was ________.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 430

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MCQ▾

### Question

The mean of 50 observations is 44. By error, one observation was noted as was misread as 56. Then the correct mean is ________

### Choices

Choice (4)Response

a.

78.5

b.

32.5

c.

65.5

d.

43.6

## Question number: 431

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MCQ▾

### Question

Area of quadrilateral formed by the vertices is ________

### Choices

Choice (4)Response

a.

310 sq. units

b.

206 sq. units

c.

289 sq. units

d.

196 sq. units

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