Mental Ability (NCO- Cyber Olympiad Class 7): Questions 168 - 174 of 205

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Question number: 168

» Mental Ability » Basic Arithmetic

MCQ▾

Question

28 % of 450 is ________.

Choices

Choice (4) Response

a.

140

b.

112

c.

126

d.

125

Question number: 169

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Human blood WBC’s are expressed in terms of number of red blood cells per cubic mm. Express 9.9 million blood cells per cubic mm terms of scientific notation.

Choices

Choice (4) Response

a.

99 ×106

b.

0.99 ×105

c.

0.99 ×106

d.

9.9 ×106

Question number: 170

» Mental Ability » Basic Arithmetic

MCQ▾

Question

The ratio of the number of boys and girls in a college is 4: 3. If the percentage increase in the number of boys and girls be 17 % and 22 % respectively, what will be the new ratio?

Choices

Choice (4) Response

a.

12: 21

b.

5: 9

c.

21: 22

d.

34: 33

Question number: 171

» Mental Ability » Basic Algebra

MCQ▾

Question

Express 0.11 as a vulgar fraction.

Choices

Choice (4) Response

a.

69550

b.

11100

c.

161300

d.

121200

Question number: 172

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A boat covers a certain distance downstream in 1 hour, while it comes back in 1 23 hours. If the speed of the stream be 2 kmph, what is the speed of the boat in still water?

Choices

Choice (4) Response

a.

11 kmps

b.

15 kmps

c.

5 kmps

d.

8 kmps

Question number: 173

» Mental Ability » Basic Geometry

MCQ▾

Question

XYZ is an isosceles triangle with XY = 12 m and Y=Z , then XZ ________?

Choices

Choice (4) Response

a.

12 m

b.

6 m

c.

3 m

d.

11 m

Question number: 174

» Mental Ability » Basic Arithmetic

MCQ▾

Question

What percent of 17 is 135 ?

Choices

Choice (4) Response

a.

20%

b.

25%

c.

0.4%

d.

2.5%

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