# Mathematics-Rational Numbers (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 7 - 11 of 13

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## Question number: 7

» Mathematics » Rational Numbers

MCQ▾

### Question

20 L of a mixture contains milk and water in the ratio 5: 3. If 4 L of this mixture are replaced by 4 L of milk, the ratio of milk to water in the new mixture will become

### Choices

Choice (4) Response

a.

9: 7

b.

8: 3

c.

4: 6

d.

7 : 3

## Question number: 8

» Mathematics » Rational Numbers

MCQ▾

### Question

A merchant advertises 10 % off on the items bought from his store. The total discount got by a customer who bought a suitcase worth Rs. 560, a bag worth Rs. 90 and a towel worth Rs. 45 is

### Choices

Choice (4) Response

a.

Rs. 71.50

b.

Rs. 69.50

c.

Rs. 70

d.

All of the above

## Question number: 9

» Mathematics » Rational Numbers

MCQ▾

### Question

ABC is a triangle and AD is perpendicular to BC. It is given that the length of AB, BC and CA are all rational numbers. Which of the following is correct?

### Choices

Choice (4) Response

a.

AD and BD must be rational

b.

BD must be rational but AD need not be rational

c.

AD must be rational but BD need not be rational

d.

Neither AD nor BD need be rational

## Question number: 10

» Mathematics » Rational Numbers

MCQ▾

### Question

Which of the following is rational?

### Choices

Choice (4) Response

a.

Radius of a circle with circumference

b.

Circumference of a circle with radius

c.

Radius of a circle with area

d.

Area of a circle with radius

## Question number: 11

» Mathematics » Rational Numbers

MCQ▾

### Question

A sum of Rs. 1550 was lent partly at and partly at simple interest. The total interest received after 3 year was Rs. 300. The ratio of money lent at to is

### Choices

Choice (4) Response

a.

b.

c.

d.

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