# Playing With Numbers (IMO- Mathematics Olympiad (SOF) Class 6): Questions 81 - 86 of 86

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## Question number: 81

» Playing With Numbers

MCQ▾

### Question

The HCF of two numbers is 28 and their LCM is 336. If one number is 112, then the other number is

### Choices

Choice (4) Response

a.

34

b.

92

c.

84

d.

64

## Question number: 82

» Playing With Numbers

MCQ▾

### Question

The least number of square tiles that will be needed to coat a plot of 126 m by 63 m is

### Choices

Choice (4) Response

a.

4 tiles

b.

2 tile

c.

3 tiles

d.

1 tiles

## Question number: 83

» Playing With Numbers

MCQ▾

### Question

Two tanks contain 360 liters and 900 liters of water respectively, then the maximum capacity of a container which can measure the water out of both the tanks when used an exact number of times is ________.

### Choices

Choice (4) Response

a.

160 liters

b.

170 liters

c.

190 liters

d.

180 liters

## Question number: 84

» Playing With Numbers

Appeared in Year: 2012

MCQ▾

### Question

A prime number can best be described as ________.

### Choices

Choice (4) Response

a.

A number with more than 2 different factors

b.

Always an even number

c.

Always an odd number

d.

A number with exactly 2 factors

## Question number: 85

» Playing With Numbers

Appeared in Year: 2012

MCQ▾

### Question

A number for which sum of all its factors is equal to ________ the number is called perfect number.

### Choices

Choice (4) Response

a.

Twice

b.

Square

c.

Thrice

d.

Four times

## Question number: 86

» Playing With Numbers

Appeared in Year: 2012

MCQ▾

### Question

Find the lowest natural number which when divided by 112, 140 and 168 leaves a remainder 8 in each case.

### Choices

Choice (4) Response

a.

1440

b.

720

c.

1688

d.

1672

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