# Mathematics [NSTSE (National Science Talent Search Exam- Unified Council) Class 7]: Questions 28 - 37 of 1128

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## Question 28

Mathematics
Edit

### Question

MCQ▾

The solution of is

### Choices

Choice (4)Response

a.

0.5

b.

- 0.5

c.

- 0.2

d.

0.3

## Question 29

Edit

### Question

MCQ▾

The ratio of the heights of A and B is 5: 7. If B is 2.1 m tall, then the height of A is

### Choices

Choice (4)Response

a.

1.5 m

b.

0.3 m

c.

1.8 m

d.

2.8 m

## Question 30

Edit

### Question

MCQ▾

Are they in proportion 8: 2 and 4: 16?

### Choices

Choice (4)Response

a.

No

b.

Yes

c.

Sometimes

d.

None of the above

## Question 31

Edit

### Question

MCQ▾

Ratio symbol is ________ and is read as ________.

### Choices

Choice (4)Response

a.

=, equal to

b.

: , is to

c.

: : , equal to

d.

None of the above

## Question 32

Edit

MCQ▾

is

### Choices

Choice (4)Response

a.

75.42

b.

0.7542

c.

0.07542

d.

754.2

## Question 33

Edit

### Question

MCQ▾

For 20: 10: : 10: 5, the mean proportion is

### Choices

Choice (4)Response

a.

10

b.

100

c.

5

d.

20

## Question 34

Edit

### Question

MCQ▾

When a number is reduced by 14, it becomes 30 % of itself. Find the number.

### Choices

Choice (4)Response

a.

70

b.

20

c.

30

d.

60

## Question 35

Mathematics
Edit

### Question

MCQ▾

of a cloth is white, of a cloth is red and remaining 6 meters is painted blue. Find the length of cloth.

### Choices

Choice (4)Response

a.

65 m

b.

80 m

c.

70 m

d.

90 m

## Question 36

Edit

### Question

MCQ▾

Difference of 99.99 and 100 is

### Choices

Choice (4)Response

a.

1.10

b.

0.11

c.

0.1

d.

0.01

## Question 37

Mathematics
Edit

### Question

MCQ▾

The present age of A is twice that of B. 10 years from now, age of A will be times of B. Find the present ages of A and B respectively.

### Choices

Choice (4)Response

a.

20,10

b.

10,20

c.

20,30

d.

30,20