Playing With Numbers (IMO- Mathematics Olympiad 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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