# IMO- Mathematics Olympiad (SOF) Class 6: Questions 183 - 189 of 1049

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## Question number: 183

MCQ▾

### Question

Prime factorization of 13915 is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 184

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

7

b.

3

c.

4

d.

5

## Question number: 185

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

19

b.

1

c.

0

d.

-9

## Question number: 186

MCQ▾

### Question

Observe the following patterns. Then find the sum of .

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

### Choices

Choice (4) Response

a.

150

b.

320

c.

180

d.

200

## Question number: 187

MCQ▾

### Question

The expression is equivalent to, uses the ________ property.

### Choices

Choice (4) Response

a.

Associative

b.

Closure

c.

Identity

d.

Commutative

## Question number: 188

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: 189

MCQ▾

### Question

A number is always divisible by 60 if

### Choices

Choice (4) Response

a.

It is divisible by both 6 and 10

b.

It is divisible by both 2 and 30

c.

It is divisible by both 4 and 15

d.

All a. , b. and c. are correct

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