Mathematics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 544 - 550 of 989

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Question 544

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Question

MCQ▾

The area of the base of a cone is 308 sq cm. Its height is 24 cm. Then its total surface area is ________.

Choices

Choice (4)Response

a.

b.

c.

d.

Question 545

Mathematics
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Question

MCQ▾

If a and b are two rational numbers, then which of the following statements is wrong?

Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

Question 546

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Question

MCQ▾

The ratio of the volume and curved surface area of a cylinder of unit radius and unit height

Choices

Choice (4)Response

a.

2: 3

b.

2: 1

c.

1: 2

d.

3: 2

Question 547

Mathematics
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Question

MCQ▾

The average weight of sample of 8 mangoes is 58 g. Later it was found that the weighing machine had shown the weight of each mango 3 g more. The correct average weight of a mango is

Choices

Choice (4)Response

a.

61 g

b.

55 g

c.

66 g

d.

50 g

Question 548

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Question

MCQ▾

A cylindrical rod whose height is 16 times of its radius is melted and recast into spherical balls of same radius. The number of balls will be

Choices

Choice (4)Response

a.

6

b.

12

c.

8

d.

4

Question 549

Mathematics
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Question

MCQ▾

If 3,7, 8 and 4 occur with frequencies 2,6, 7 and 3 respectively, then the arithmetic mean is

Choices

Choice (4)Response

a.

18

b.

6.44

c.

6.2

d.

8

Question 550

Mathematics
Edit

Question

MCQ▾

Which of the following statements is true?

Choices

Choice (4)Response

a.

b.

c.

d.