Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad (SOF) Class 7): Questions 77 - 84 of 122

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Question number: 77

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Two poles 14 m and 7 m high stand upright in a ground. If their feet are 24 m apart, find the distance between tops.

Choices

Choice (4) Response

a.

39 m

b.

35 m

c.

30 m

d.

25 m

Question number: 78

» Mental Ability » Basic Arithmetic

MCQ▾

Question

If = 0.027, then will be ________

Choices

Choice (4) Response

a.

0.125

b.

0.25

c.

1

d.

0.0625

Question number: 79

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A train 800 meters long is running at a speed of . If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is.

Choices

Choice (4) Response

a.

540

b.

500

c.

360

d.

130

Question number: 80

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A boat covers a certain distance downstream in 2 hour, while it comes back in 1 hours. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?

Choices

Choice (4) Response

a.

15 kmps

b.

8 kmps

c.

11 kmps

d.

13 kmps

Question number: 81

» Mental Ability » Basic Arithmetic

MCQ▾

Question

If each side of a square is doubled, its area

Choices

Choice (4) Response

a.

Becomes 8 times

b.

Becomes 6 times

c.

Becomes 4 times

d.

Is doubled

Question number: 82

» Mental Ability » Basic Arithmetic

MCQ▾

Question

What percent of is ?

Choices

Choice (4) Response

a.

2.5%

b.

25%

c.

0.4%

d.

6.6%

Question number: 83

» Mental Ability » Basic Arithmetic

MCQ▾

Question

The average age of 30 children in a class is 10 years. If the teacher’s age is included, the average age becomes 12 years. Find the teacher’s age.

Choices

Choice (4) Response

a.

42

b.

72

c.

35

d.

45

Question number: 84

» Mental Ability » Basic Arithmetic

MCQ▾

Choices

Choice (4) Response

a.

2190

b.

19418

c.

5012.5

d.

19578

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