# Mathematics [NSTSE (National Science Talent Search Exam- Unified Council) Class 7]: Questions 721 - 727 of 1128

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## Question number: 721

Edit

### Question

MCQ▾

Which of the following statement is false?

### Choices

Choice (4)Response

a.

, if n is an even integer

b.

For any rational number a,

c.

If then n = 1

d.

All of the above

## Question number: 722

Mathematics
Edit

### Question

MCQ▾

When two line segments meet at a point forming right angle they are said to be ________ to each other.

### Choices

Choice (4)Response

a.

Perpendicular

b.

Parallel

c.

Equal

d.

None of the above

## Question number: 723

Edit

### Question

MCQ▾

Find the area of the shaded region of the following figure.

ABCD is a rectangle having length 80 cm and breadth 40 cm. P, Q, R and S are midpoints of AB, BC, CD and AD respectively.

### Choices

Choice (4)Response

a.

400

b.

800

c.

1600

d.

3200

## Question number: 724

Edit

### Question

MCQ▾

Conjugate surd of is

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 725

Edit

### Question

MCQ▾

If two angles in a triangle are and , then the third angle is

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 726

Mathematics
Edit

### Question

MCQ▾

The identity element w. r. t multiplication in integers is ________.

### Choices

Choice (4)Response

a.

1

b.

-1

c.

0

d.

None of the above

## Question number: 727

Edit

### Question

MCQ▾

By selling an article for Rs. 500 a man loses 15%. At what cost he will sell in order to gain 20%?

### Choices

Choice (4)Response

a.

580 Rs.

b.

1000 Rs.

c.

760 Rs.

d.

706 Rs.