Playing With Numbers (IMO- Mathematics Olympiad Class 6): Questions 1 - 7 of 86

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Question number: 1

» Playing With Numbers

MCQ▾

Question

A number is always divisible by 90 if

Choices

Choice (4) Response

a.

It is divisible by both 9 and 10

b.

It is divisible by both 5 and 18

c.

It is divisible by both 2 and 45

d.

All a. , b. and c. are correct

Question number: 2

» Playing With Numbers

MCQ▾

Question

The prime number that is placed at fifth after prime number 7 is

Choices

Choice (4) Response

a.

23

b.

29

c.

19

d.

27

Question number: 3

» Playing With Numbers

MCQ▾

Question

Observe the following patterns. Then find the sum of 1+3+5+7+9++19 .

1=1×1=1

1+3=2×2=4

1+3+5=3×3=9

1+3+5+7=4×4=16

1+3+5+7+9=5×5=25

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

Choices

Choice (4) Response

a.

64

b.

100

c.

121

d.

81

Question number: 4

» Playing With Numbers

MCQ▾

Question

The number (12, 7) are

Choices

Choice (4) Response

a.

Co-prime numbers

b.

Prime numbers

c.

Prime and co-prime

d.

None of the above

Question number: 5

» Playing With Numbers

MCQ▾

Question

1265 is divisible by

Choices

Choice (4) Response

a.

3

b.

11

c.

10

d.

2

Question number: 6

» Playing With Numbers

MCQ▾

Question

There are 207 white balls and 115 blue balls. These balls are to be arranged in buckets containing the same number of balls. Then the greatest number of balls possible in each bucket is

Choices

Choice (4) Response

a.

217

b.

18

c.

28

d.

23

Question number: 7

» Playing With Numbers

MCQ▾

Question

The number 6, 43, 590 is divisible by

Choices

Choice (4) Response

a.

2

b.

6

c.

3

d.

All a. , b. and c. are correct

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