IMO- Mathematics Olympiad Class 6: Questions 219 - 225 of 1049

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Question number: 219

» 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: 220

» 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: 221

» 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: 222

» Number Systems

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.

a×c<b×c

b.

a×c>b×c

c.

a×c=b×c

d.

None of the above

Question number: 223

» 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: 224

» 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: 225

» Number Systems

MCQ▾

Question

If a&b are two whole numbers, then commutative law is applicable to multiplication if

Choices

Choice (4) Response

a.

a=b

AND

a>b

b.

a<b

c.

ab

d.

All a. , b. and c. are correct

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