IMO Level 1- Mathematics Olympiad (SOF) Class 6: Questions 230 - 238 of 1059

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Question number: 230

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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.

35

b.

53

c.

49

d.

36

Question number: 231

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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: 232

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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: 233

» Number Systems

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Question

Product of two integer is If one of the integers is , then the other is

Choices

Choice (4)Response

a.

28

b.

8

c.

1

d.

0

Question number: 234

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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.

25 tile

b.

30 tiles

c.

15 tiles

d.

45 tiles

Question number: 235

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Question

The number (67,54) are

Choices

Choice (4)Response

a.

Co-prime numbers

b.

Prime numbers

c.

prime and co-prime

d.

All of the above

Question number: 236

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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.

191,15

b.

190,14

c.

180,20

d.

195,25

Question number: 237

» Number Systems

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MCQ▾

Question

The integer which is 5 less than is

Choices

Choice (4)Response

a.

13

b.

- 15

c.

8

d.

9

Question number: 238

» Playing with Numbers

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MCQ▾

Question

The number (9,8) are

Choices

Choice (4)Response

a.

Prime numbers

b.

Co-prime numbers

c.

Prime and co-prime

d.

Question does not provide sufficient data or is vague

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