NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 741 - 747 of 1998

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Question 741

Question MCQ▾

= ________.

Choices

Choice (4)Response

a.

b.

c.

d.

0

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Question 742

Question MCQ▾

25 years ago, when my parents got married, their average age was 30 years, now the average age of my family, consisting of myself and my parents only is 40 years. My present age is

Choices

Choice (4)Response

a.

10 years

b.

12 years

c.

20 years

d.

18 years

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Question 743

Question MCQ▾

The mean of 7, x, 11, y and 21 is 14. Then

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 744

Question MCQ▾

The greatest among is

Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

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Question 745

Question MCQ▾

A book containing 400 pages is opened at random. The probability that a triplet page is found is

Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

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Question 746

Question MCQ▾

A cylindrical vessel of diameter 16 cm is partly filled with water. 180 lead balls are dropped in it. The raise in water level is 1.4 cm. The diameter of each ball is ________.

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 747

Question MCQ▾

Which of the following statements is correct?

Choices

Choice (4)Response

a.

0 is called the additive identity for rational number

b.

1 is called the multiplicative identity for rational number

c.

The additive inverse of 0 is zero itself

d.

All a., b. and c. are correct

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