Mental Ability (NCO- Cyber Olympiad Class 7): Questions 73 - 79 of 205

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Question number: 73

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A cistern can be filled by two tapes A and B in 3 hours and 2 hours respectively. How much time will the cistern be filled up completely?

Choices

Choice (4) Response

a.

3.07 hours

b.

2.4 hours

c.

1.2 hours

d.

3.6 hours

Question number: 74

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A boat covers a certain distance downstream in 1 hour, while it comes back in 112 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.

12 kmps

b.

15 kmps

c.

14 kmps

d.

13 kmps

Question number: 75

» Mental Ability » Number Games

MCQ▾

Question

What is the sum of two consecutive even numbers, the difference of whose squares is 164?

Choices

Choice (4) Response

a.

46

b.

38

c.

82

d.

34

Question number: 76

» Mental Ability » Basic Arithmetic

MCQ▾

Question

If each side of a cube is doubled, its volume

Choices

Choice (4) Response

a.

Becomes 6 times

b.

Becomes 8 times

c.

Becomes 4 times

d.

Is doubled

Question number: 77

» Mental Ability » Basic Arithmetic

MCQ▾

Question

In an election, two candidates contested. A candidate secured 30 % of the valid votes and is elected by a majority of 150 votes. Find the total number of valid votes.

Choices

Choice (4) Response

a.

375

b.

570

c.

400

d.

510

Question number: 78

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Simplify: 108÷36of14+8

Choices

Choice (4) Response

a.

10

b.

20

c.

11

d.

21

Question number: 79

» Mental Ability » Basic Arithmetic

MCQ▾

Question

An ore contain 9 % lead. How many kilograms of the ore are required to get 60 kg of lead?

Choices

Choice (4) Response

a.

666.66 kg

b.

850.78 kg

c.

544 kg

d.

144.22 kg

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