# IMO Level 1- Mathematics Olympiad (SOF) Class 6: Questions 183 - 189 of 1059

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## Question number: 183

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MCQ▾

### Question

Prime factorization of 13915 is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 184

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MCQ▾

### Question

Number of prime and co-prime numbers from 80 to 100 are

### Choices

Choice (4) Response

a.

7

b.

4

c.

5

d.

3

## Question number: 185

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MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

-9

b.

1

c.

0

d.

19

## Question number: 186

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MCQ▾

### Question

Observe the following patterns. Then find the sum of .

………………………………………………………. ‎……………………………………………………….

### Choices

Choice (4) Response

a.

180

b.

150

c.

320

d.

200

## Question number: 187

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MCQ▾

### Question

The expression is equivalent to, uses the ________ property.

### Choices

Choice (4) Response

a.

Commutative

b.

Associative

c.

Closure

d.

Identity

## Question number: 188

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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.

16

b.

54

c.

64

d.

63

## Question number: 189

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MCQ▾

### Question

A number is always divisible by 60 if

### Choices

Choice (4) Response

a.

It is divisible by both 4 and 15

b.

It is divisible by both 2 and 30

c.

It is divisible by both 6 and 10

d.

All a. , b. and c. are correct