# Mathematics (NSTSE (National Science Talent Search Exam- Unified Council) Class 6): Questions 781 - 789 of 1162

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## Question number: 781

» Mathematics » Understanding Elementary Shapes

MCQ▾

### Question

As shown in below figure, interior angle is and exterior angle is is given, then angle X is?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 782

» Mathematics » Playing With Numbers

MCQ▾

### Question

The HCF of 15,20 and 30 is

### Choices

Choice (4) Response

a.

5

b.

20

c.

15

d.

10

## Question number: 783

» Mathematics » Fractions

MCQ▾

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 784

» Mathematics » Integers

MCQ▾

### Question

If positive sign precedes a bracket the sign of the terms inside the bracket will ________when the bracket is removed.

### Choices

Choice (4) Response

a.

0

b.

no change

c.

change

d.

None of the above

## Question number: 785

» Mathematics » Playing With Numbers

MCQ▾

### Question

The LCM of two numbers is X and their HCF is Y. So, the sum of two numbers is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 786

» Mathematics » Integers

MCQ▾

### Question

Simplified value of

### Choices

Choice (4) Response

a.

b.

c.

4

d.

Question does not provide sufficient data or is vague

## Question number: 787

» Mathematics » Playing With Numbers

MCQ▾

### Question

The number of prime numbers between 2 and 15 are

### Choices

Choice (4) Response

a.

5

b.

4

c.

3

d.

6

## Question number: 788

» Mathematics » Integers

MCQ▾

### Question

The addition of identity element

### Choices

Choice (4) Response

a.

-1

b.

a

c.

1

d.

0

## Question number: 789

» Mathematics » Whole Numbers

MCQ▾

### Question

Predecessor of natural number 2

### Choices

Choice (4) Response

a.

2

b.

1

c.

Does not exist

d.

4

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