Playing With Numbers (IMO- Mathematics Olympiad Class 8): Questions 24 - 31 of 61

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Question number: 24

» Playing With Numbers

MCQ▾

Question

The number which is divisible by 5 is________.

Choices

Choice (4) Response

a.

12345

b.

24675

c.

21300

d.

All a. , b. and c. are correct

Question number: 25

» Playing With Numbers

MCQ▾

Question

Find the least value of x for which 7x5462 is divisible by 9.

Choices

Choice (4) Response

a.

5

b.

3

c.

2

d.

4

Question number: 26

» Playing With Numbers

MCQ▾

Question

When a certain number is multiplied by 13, the product consists entirely of fives. The smallest such number is________.

Choices

Choice (4) Response

a.

4273

b.

4271

c.

4275

d.

4256

Question number: 27

» Playing With Numbers

MCQ▾

Question

If N is divided by 5 leaves a remainder of 4, then one’s digit of N must be________.

Choices

Choice (4) Response

a.

Either 9 or 4

b.

Either 1 or 4

c.

Either 5 or 4

d.

All of the above

Question number: 28

» Playing With Numbers

MCQ▾

Question

If the 3-digit number 14x is divisible by 9, then the value of x is________.

Choices

Choice (4) Response

a.

2

b.

5

c.

3

d.

4

Question number: 29

» Playing With Numbers

MCQ▾

Question

If +2ABCCA559 and there is no carry on addition, then the value of B is________.

Choices

Choice (4) Response

a.

3

b.

1

c.

7

d.

5

Question number: 30

» Playing With Numbers

MCQ▾

Question

The number (10n1) is divisible by 11 for________.

Choices

Choice (4) Response

a.

Even value of n

b.

For all Naturals numbers

c.

Odd value of n

d.

None of the above

Question number: 31

» Playing With Numbers

MCQ▾

Question

213456 is divisible by________.

Choices

Choice (4) Response

a.

2

b.

7

c.

5

d.

Question does not provide sufficient data or is vague

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