Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad Class 7): Questions 113 - 119 of 122

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Question number: 113

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A man sold a radio for Rs. 1274 and gained 30%, the radio was bought for?

Choices

Choice (4) Response

a.

850

b.

1790

c.

1850

d.

980

Question number: 114

» Mental Ability » Basic Arithmetic

MCQ▾

Question

28 % of 450 is ________.

Choices

Choice (4) Response

a.

140

b.

112

c.

126

d.

125

Question number: 115

» 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: 116

» 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: 117

» 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: 118

» 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%

Question number: 119

» Mental Ability » Basic Arithmetic

MCQ▾

Question

The present ages of three persons in proportions 3: 6: 9. Five years ago, the sum of their ages was 57. Find their present ages (in years).

Choices

Choice (4) Response

a.

12, 24, 36

b.

18, 32, 15

c.

15, 30, 45

d.

All of the above

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