Number Systems (IMO- Mathematics Olympiad (SOF) Class 6): Questions 54 - 58 of 84

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Question number: 54

» Number Systems

MCQ▾

Question

Multiply the unit’s place of the number obtained by reversing the digits of the number 78923 with the hundred’s place of the number obtained by interchanging the digits in the unit’s place and the thousand’s place of the same number, we get________.

Choices

Choice (4) Response

a.

54

b.

64

c.

16

d.

63

Question number: 55

» Number Systems

MCQ▾

Question

Subtract the number obtained by reversing the digits of the number 20198 from the number obtained by interchanging the digits in the unit’s place and the hundred’s place of the same number, we get________.

Choices

Choice (4) Response

a.

77121

b.

- 68229

c.

68004

d.

- 68211

Question number: 56

» Number Systems

MCQ▾

Question

Find the sum of the given expression.

Choices

Choice (4) Response

a.

55

b.

- 100

c.

- 90

d.

100

Question number: 57

» Number Systems

MCQ▾

Question

Multiplying a negative integer for even number of times gives a ________ result.

Choices

Choice (4) Response

a.

0

b.

Negative

c.

Positive

d.

None of the above

Question number: 58

» Number Systems

MCQ▾

Question

Sigma’s monthly salary is Rs. 22000. She spends Rs. 2000 for her beauty treatments, Rs. 1500 for purchasing clothes, Rs. 1250 for purchasing groceries and kitchen expenses, etc. , Rs. 3500 for jewelries and pays a rent of Rs. 5000 in a particular month. She also earns other Rs. 5000 by tuitions. How much does she save in this month?

Choices

Choice (4) Response

a.

Rs. 13750

b.

Rs. 15750

c.

Rs. 12945

d.

Rs. 13550

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