Number Systems (IMO- Mathematics Olympiad Class 6): Questions 62 - 68 of 84

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Question number: 62

» Number Systems

MCQ▾

Question

Find the sum of the given expression.

Choices

Choice (4) Response

a.

- 35

b.

48

c.

35

d.

- 89

Question number: 63

» Number Systems

MCQ▾

Question

Subtract the number obtained by reversing the digits of the number 65302 from the number obtained by interchanging the digits in the ten’s place and the hundred’s place of the same number, we get________.

Choices

Choice (4) Response

a.

95388

b.

-64746

c.

76446

d.

44676

Question number: 64

» Number Systems

MCQ▾

Question

Which one is correct?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 65

» Number Systems

MCQ▾

Question

ABC is a three digit number in which the digit A is greater than the digit B and C. If the difference between ABC and CBA is 297 and the difference between ABC and BAC is 450, find all possible three digit numbers ABC.

Choices

Choice (4) Response

a.

724

b.

946

c.

835

d.

All a. , b. and c. are correct

Question number: 66

» Number Systems

MCQ▾

Question

The integer which is 5 less than is

Choices

Choice (4) Response

a.

11

b.

c.

9

d.

2

Question number: 67

» Number Systems

MCQ▾

Question

The integer which is 7 more than is

Choices

Choice (4) Response

a.

4

b.

- 10

c.

16

d.

- 4

Question number: 68

» Number Systems

MCQ▾

Question

There are 216 black balls in a basket. A boy takes out 8 black balls from it and replaces them by 16 white balls. He continues to do so, till all black balls are replaced by white balls. Find the number of white balls put in the basket?

Choices

Choice (4) Response

a.

485

b.

654

c.

432

d.

462

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