Mathematics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 684 - 690 of 989

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Question 684

Mathematics
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Question

MCQ▾

The mean of five numbers is 32. If one of the numbers is excluded the mean gets reduced by 4. The excluded number is

Choices

Choice (4)Response

a.

4

b.

6

c.

8

d.

7

Question 685

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Question

MCQ▾

The cost of painting the TSA of cone at is Rs. 140.80. The volume of the cone its slant height being 48 cm is

Choices

Choice (4)Response

a.

b.

c.

d.

Question 686

Mathematics
Edit

Question

MCQ▾

The daily sale of kerosene (in liters) in a ration shop for six days is as follows:

65,90,68,55,92.5 and 127.5 The average daily sale is

Choices

Choice (4)Response

a.

83

b.

72

c.

89

d.

98

Question 687

Mathematics
Edit

Question

MCQ▾

Addition of rational numbers does not satisfy which of the following property?

Choices

Choice (4)Response

a.

Commutative

b.

Associative

c.

Closure

d.

None of the above

Question 688

Mathematics
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Question

MCQ▾

The mean of 9, x, 5, y and 13 is 8. Then

Choices

Choice (4)Response

a.

b.

c.

d.

Question 689

Mathematics
Edit

Question

MCQ▾

The division of two factors with unlike signs is ________.

Choices

Choice (4)Response

a.

Positive

b.

Cannot be determined

c.

Negative

d.

Question does not provide sufficient data or is vague

Question 690

Mathematics
Edit

Question

MCQ▾

The probability for a randomly selected number out of 21,22,23,24, …. , 50 to be a prime number is

Choices

Choice (4)Response

a.

b.

c.

d.