IMO Level 1- Mathematics Olympiad (SOF) Class 6: Questions 213 - 219 of 1059

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Question 213

Question

MCQ▾

When a number is divided by eight, it has a remainder of 2. When it is divided by nine, it has remainder of 1. What is the number?

Choices

Choice (4)Response

a.

15

b.

12

c.

34

d.

10

Question 214

Question

MCQ▾

What least value should be given to ⊕ so that the number 653 ⊕ 47 is divisible by 11?

Choices

Choice (4)Response

a.

9

b.

6

c.

7

d.

1

Question 215

Question

MCQ▾

The numbers which have more than two factors are called ________.

Choices

Choice (4)Response

a.

Composite

b.

Prime

c.

Prime & Composite

d.

Question does not provide sufficient data or is vague

Question 216

Question

MCQ▾

The LCM of two numbers is 198. If one number is 396 and another is 66, then the HCF is

Choices

Choice (4)Response

a.

132

b.

144

c.

231

d.

154

Question 217

Question

MCQ▾

The integer which is 7 more than is

Choices

Choice (4)Response

a.

4

b.

- 4

c.

- 10

d.

16

Question 218

Question

MCQ▾

There are 216 black balls in a basket. A boy takes out 8 black balls from it and replaces them by 16 white balls. He continues to do so, till all black balls are replaced by white balls. Find the number of white balls put in the basket?

Choices

Choice (4)Response

a.

462

b.

654

c.

432

d.

485

Question 219

Question

MCQ▾

Number of prime and co-prime numbers from 30 to 90 are

Choices

Choice (4)Response

a.

14

b.

15

c.

13

d.

19