# IMO Level 1- Mathematics Olympiad (SOF) Class 6: Questions 216 - 222 of 1059

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## Question number: 216

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MCQ▾

### Question

The LCM of two numbers is 198. If one number is 396 and another is 66, then the HCF is

### Choices

Choice (4) Response

a.

132

b.

144

c.

231

d.

154

## Question number: 217

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MCQ▾

### Question

The integer which is 7 more than is

### Choices

Choice (4) Response

a.

4

b.

- 4

c.

- 10

d.

16

## Question number: 218

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MCQ▾

### Question

There are 216 black balls in a basket. A boy takes out 8 black balls from it and replaces them by 16 white balls. He continues to do so, till all black balls are replaced by white balls. Find the number of white balls put in the basket?

### Choices

Choice (4) Response

a.

462

b.

654

c.

432

d.

485

## Question number: 219

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MCQ▾

### Question

Number of prime and co-prime numbers from 30 to 90 are

### Choices

Choice (4) Response

a.

14

b.

15

c.

13

d.

19

## Question number: 220

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MCQ▾

### Question

Two tankers contain 850 liters and 680 liters of kerosene oil respectively, then the maximum capacity of a container which can measure the kerosene out of both the tankers when used an exact number of times is ________.

### Choices

Choice (4) Response

a.

34 liters

b.

85 liters

c.

170 liters

d.

10 liters

## Question number: 221

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MCQ▾

### Question

The two numbers smaller than 4000 which are exactly divisible by each of 2,3, 4,5, 6 and 8 is

### Choices

Choice (4) Response

a.

3920,4140

b.

2720,4320

c.

3720,2880

d.

4020,3810

## Question number: 222

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MCQ▾

### Question

If a, b and c are whole numbers such that b > a and c 0 and c > 3, then

### Choices

Choice (4) Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague