Playing With Numbers (IMO- Mathematics Olympiad Class 6): Questions 34 - 42 of 86

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Question number: 34

» Playing With Numbers

MCQ▾

Question

The smallest number which when divided by 4, 16, 32 and 40 and leaves a remainder of 3, 15, 31 and 39 respectively is

Choices

Choice (4) Response
a.

161

b.

159

c.

147

d.

239

Question number: 35

» Playing With Numbers

MCQ▾

Question

HCF of two co-prime numbers is

Choices

Choice (4) Response
a.

0

b.

1

c.

2

d. None of the above

Question number: 36

» Playing With Numbers

MCQ▾

Question

When a number is divided by seven, it has a remainder of 2. When it is divided by six, it has remainder of 3. What is the number?

Choices

Choice (4) Response
a.

16

b.

44

c.

38

d.

9

Question number: 37

» Playing With Numbers

MCQ▾

Question

The co-prime numbers from the following pairs, is

Choices

Choice (4) Response
a.

7 and 63

b.

63 and 81

c.

35 and 21

d.

36 and 25

Question number: 38

» Playing With Numbers

MCQ▾

Question

The smallest value of ‘a’ in the number 321a8 so that it is divisible by 8 is:

Choices

Choice (4) Response
a.

1

b.

2

c.

4

d.

3

Question number: 39

» Playing With Numbers

MCQ▾

Question

693 is divisible by

Choices

Choice (4) Response
a.

6

b.

9

c.

3 & 9

d.

3

Question number: 40

» Playing With Numbers

MCQ▾

Question

Prime factorization of 13915 is

Choices

Choice (4) Response
a.

5×11×7×23

b.

5×11×11×3

c.

5×11×11×23

d.

11×7×23×3

Question number: 41

» Playing With Numbers

MCQ▾

Question

Number of prime and co-prime numbers from 80 to 100 are

Choices

Choice (4) Response
a.

7

b.

3

c.

4

d.

5

Question number: 42

» Playing With Numbers

MCQ▾

Question

Observe the following patterns. Then find the sum of 2+4+6+8+10++20 .

2=2×1=2

2+4=4×2=8

2+4+6=6×3=18

2+4+6+8=8×4=32

2+4+6+8+10=10×5=50

………………………………………………………. ……………………………………………………….

Choices

Choice (4) Response
a.

150

b.

320

c.

180

d.

200

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