Playing With Numbers (IMO- Mathematics Olympiad Class 6): Questions 65 - 72 of 86

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Question number: 65

» Playing With Numbers

MCQ▾

Question

The least number which when decreased by 7 is exactly divisible by 6, 7, 21 and 42 is

Choices

Choice (4) Response
a.

53

b.

49

c.

35

d.

36

Question number: 66

» Playing With Numbers

MCQ▾

Question

HCF of the two numbers =

Choices

Choice (4) Response
a.

Product of numbers × their LCM

b.

Product of numbers - their LCM

c.

Product of numbers + their LCM

d.

Product of numbers ÷ their LCM

Question number: 67

» Playing With Numbers

MCQ▾

Question

Which of the following is the pair that is not twin primes?

Choices

Choice (4) Response
a.

(5, 7)

b.

(11, 13)

c.

(17, 19)

d.

(23, 29)

Question number: 68

» Playing With Numbers

MCQ▾

Question

The least number of square tiles that will be needed to pave a plot 225 m by 30 m is

Choices

Choice (4) Response
a.

45 tiles

b.

15 tiles

c.

30 tiles

d.

25 tile

Question number: 69

» Playing With Numbers

MCQ▾

Question

The number (67, 54) are

Choices

Choice (4) Response
a.

prime and co-prime

b.

Prime numbers

c.

Co-prime numbers

d. Question does not provide sufficient data or is vague

Question number: 70

» Playing With Numbers

MCQ▾

Question

The number 11284 and 7655 when divided by a certain 3 digit number leave the same remainder. Find the number and the remainder

Choices

Choice (4) Response
a.

190, 14

b.

180, 20

c.

191, 15

d.

195, 25

Question number: 71

» Playing With Numbers

MCQ▾

Question

The number (9, 8) are

Choices

Choice (4) Response
a.

Co-prime numbers

b.

Prime numbers

c.

Prime and co-prime

d. All of the above

Question number: 72

» Playing With Numbers

MCQ▾

Question

The least number of square tiles that will be needed to pave a plot 135 m by 15 m is

Choices

Choice (4) Response
a.

12 tiles

b.

18 tiles

c.

9 tiles

d.

15 tiles

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