# Mathematics-Multiples and Factors (NSTSE (National Science Talent Search Exam- Unified Council) Class 4): Questions 78 - 85 of 99

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## Question number: 78

» Mathematics » Multiples and Factors

MCQ▾

### Question

The greatest prime number less than 240 is:

### Choices

Choice (4) Response

a.

233

b.

237

c.

239

d.

241

## Question number: 79

» Mathematics » Multiples and Factors

MCQ▾

### Question

A number is divisible by 9, if the sum of its digits is divisible by:

### Choices

Choice (4) Response

a.

9

b.

0

c.

7

d.

Question does not provide sufficient data or is vague

## Question number: 80

» Mathematics » Multiples and Factors

MCQ▾

LCM of 12,18 is:

### Choices

Choice (4) Response

a.

72

b.

36

c.

54

d.

48

## Question number: 81

» Mathematics » Multiples and Factors

MCQ▾

### Question

________ is composite number.

### Choices

Choice (4) Response

a.

23

b.

19

c.

12

d.

17

## Question number: 82

» Mathematics » Multiples and Factors

MCQ▾

### Question

The number 10 has 4 factors. The table below lists the number of factors for some numbers. (Model Test Paper)

 Number Number of factors 11 2 13 2 15 4 17 2 19 2

From this we can say that the number of prime numbers between 10 and 20 is:

### Choices

Choice (4) Response

a.

4

b.

Can’t say

c.

0

d.

2

## Question number: 83

» Mathematics » Multiples and Factors

MCQ▾

### Question

What is the sum of the least common multiple and highest common factor of the numbers 12 and 18?

### Choices

Choice (4) Response

a.

38

b.

40

c.

42

d.

44

## Question number: 84

» Mathematics » Multiples and Factors

MCQ▾

### Question

Number 1 has only one factor. It is neither prime nor composite. It is called ________ number.

### Choices

Choice (4) Response

a.

Twin prime

b.

Prime

c.

Unique

d.

Composite

## Question number: 85

» Mathematics » Multiples and Factors

MCQ▾

### Question

Factors of 57: 3 and ________.

### Choices

Choice (4) Response

a.

19

b.

34

c.

23

d.

57

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