# Playing With Numbers (IMO- Mathematics Olympiad Class 6): Questions 58 - 64 of 86

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## Question number: 58

» Playing With Numbers

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.

231

b.

132

c.

144

d.

154

## Question number: 59

» Playing With Numbers

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

14

b.

13

c.

15

d.

19

## Question number: 60

» Playing With Numbers

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.

85 liters

b.

10 liters

c.

170 liters

d.

34 liters

## Question number: 61

» Playing With Numbers

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.

4020, 3810

b.

3920, 4140

c.

3720, 2880

d.

2720, 4320

## Question number: 62

» Playing With Numbers

MCQ▾

### Question

The two numbers nearest to 10000 which are exactly divisible by each of 2, 3, 4, 5, 6 and 7 is

### Choices

Choice (4) Response

a.

9669, 10080

b.

10340, 10080

c.

9320, 10080

d.

9660, 10080

## Question number: 63

» Playing With Numbers

MCQ▾

### Question

The two consecutive prime numbers with difference 2 are called ________.

### Choices

Choice (4) Response

a.

Composite

b.

Co-primes

c.

Twin primes

d.

Even

## Question number: 64

» Playing With Numbers

MCQ▾

### Question

The co-prime numbers and also prime numbers from the following pairs, is

### Choices

Choice (4) Response

a.

47 and 63

b.

31 and 33

c.

29 and 57

d.

83 and 97

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