IMO- Mathematics Olympiad Class 6: Questions 125 - 131 of 1049

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Question number: 125

» Number Systems

MCQ▾

Question

The number with which 96 is multiplied so that product remains the same is ________

Choices

Choice (4) Response

a.

196

b.

1

c.

0

d.

96

Question number: 126

» Number Systems

MCQ▾

Question

Multiplicative identity for a rational number is________

Choices

Choice (4) Response

a.

2

b.

0

c.

1

d.

None of the above

Question number: 127

» Number Systems

MCQ▾

Question

If a&b are two whole numbers, then commutative law is applicable to subtraction if and only if

Choices

Choice (4) Response

a.

ab

b.

a=b

c.

a>b

d.

a<b

Question number: 128

» 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: 129

» Number Systems

MCQ▾

Question

Which of the following statement is true if N, W and I are sets of Natural, Whole and Integer numbers respectively?

Choices

Choice (4) Response

a.

I ⊂ W ⊂ N

b.

N ⊂ W ⊂ I

c.

I ⊂ N ⊂ W

d.

W ⊂ N ⊂ I

Question number: 130

» 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: 131

» 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

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