IMO- Mathematics Olympiad Class 9: Questions 66 - 72 of 919

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Question number: 66

» Number System

MCQ▾

Question

If both ‘a’ and ‘b’ are rational numbers, then ‘a’ and ‘b’ from 474+27=a7b , are ________.

Choices

Choice (4) Response

a.

a=512,b=65

b.

a=212,b=511

c.

a=1211,b=95

d.

a=1,b=52

Question number: 67

» Number System

MCQ▾

Question

The value of 18+9+19+10+110+11+111+12+112+13+113+14+114+15+115+16 is ________.

Choices

Choice (4) Response

a.

1.06

b.

8+4

c.

8+4

d.

1.00

Question number: 68

» Number System

MCQ▾

Question

The number x=1.789789789. can be expressed in the for m x=pq , where p and q are positive integers having no common factors. Then p+q equals________.

Choices

Choice (4) Response

a.

829

b.

929

c.

429

d.

729

Question number: 69

» Number System

MCQ▾

Question

The value of 15+6+16+7+17+8+18+9+19+10+110+11+111+12

Choices

Choice (4) Response

a.

7

b.

0

c.

23

d.

1

Question number: 70

» Number System

MCQ▾

Question

If 5=2.236 and 10=3.162 , then the value of 1510+20+40580 is________.

Choices

Choice (4) Response

a.

4.398

b.

3.398

c.

5.398

d.

6.398

Question number: 71

» Number System

MCQ▾

Question

If N=5+2+525+1 , then N equals________.

Choices

Choice (4) Response

a.

1

b.

52

c.

2

d.

25+1

Question number: 72

» Number System

MCQ▾

Question

If 444+444+444+444=4x , then x is________.

Choices

Choice (4) Response

a.

11

b.

44

c.

45

d.

176

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