# Mathematics [NSTSE (National Science Talent Search Exam- Unified Council) Class 7]: Questions 278 - 282 of 1128

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## Question number: 278

» Mathematics » Rational Numbers

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MCQ▾

### Question

Which of the following alternatives is wrong? Given that

(I) Difference of two rational numbers is a rational number

(II) Subtraction is commutative on rational numbers

(III) Addition is not commutative on rational numbers

### Choices

Choice (4)Response

a.

(I) only

b.

(I) and (III)

c.

(II) and (III)

d.

None of the above

## Question number: 279

» Mathematics » Integers

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MCQ▾

### Question

If the exponent of a negative integer is even then the result is a ________ integer.

### Choices

Choice (4)Response

a.

0

b.

Positive

c.

Negative

d.

Question does not provide sufficient data or is vague

## Question number: 280

» Mathematics » Exponents and Powers

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MCQ▾

Simplify

### Choices

Choice (4)Response

a.

2

b.

1

c.

4

d.

## Question number: 281

» Mathematics » Symmetry

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MCQ▾

### Question

The number of line of symmetries that the given figure has:

### Choices

Choice (4)Response

a.

3

b.

4

c.

1

d.

2

## Question number: 282

» Mathematics » Rational Numbers

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MCQ▾

is a

### Choices

Choice (4)Response

a.

Either positive or negative rational number

b.

Negative rational number

c.

Neither positive nor negative rational number

d.

Positive rational number

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