Mental Ability (NCO- Cyber Olympiad Class 7): Questions 142 - 148 of 205

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Question number: 142

» Mental Ability » Basic Arithmetic

MCQ▾

Question

If 12 men working 5 hours a day can do a piece of work in 5 days; in how days will 10 men working for 3 hours a day to do the same piece of work?

Choices

Choice (4) Response

a.

11.66 days

b.

30 days

c.

10 days

d.

55 days

Question number: 143

» Mental Ability » Basic Arithmetic

MCQ▾

Question

If , find the value of x.

Choices

Choice (4) Response

a.

62

b.

68

c.

58

d.

26

Question number: 144

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Human blood RBC’s are expressed in terms of number of red blood cells per cubic mm. Express 5.5 million blood cells per cubic mm terms of scientific notation.

Choices

Choice (4) Response

a.

55

b.

5.5

c.

5.5

d.

0.55

Question number: 145

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A train 500 meters long is running at a speed of 48 . If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is.

Choices

Choice (4) Response

a.

130

b.

500

c.

300

d.

100

Question number: 146

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Find the value of from the equation

Choices

Choice (4) Response

a.

62

b.

35

c.

45

d.

33

Question number: 147

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A man sold a radio for 1220 and gained 20%, then the radio was bought for?

Choices

Choice (4) Response

a.

1016.66

b.

1200

c.

980

d.

1790

Question number: 148

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Two cubes have volumes in the ratio 1: 125. Then the ratio of their sides is

Choices

Choice (4) Response

a.

1: 18

b.

1: 2

c.

1: 5

d.

1: 8

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