Mental Ability (NCO- Cyber Olympiad Class 7): Questions 53 - 60 of 205

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Question number: 53

» Mental Ability » Basic Arithmetic

MCQ▾

Question

7 55 % expressed as a fraction is ________?

Choices

Choice (4) Response

a.

85

b.

110

c.

10

d.

225

Question number: 54

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Which of the following is in descending order?

Choices

Choice (4) Response

a.

78,911,57

b.

78 , 57 , 911

c.

57 , 911 , 78

d.

None of the above

Question number: 55

» Mental Ability » Basic Arithmetic

MCQ▾

Question

The average of 3 results is 10 and that of the first two is 5. The third result is________.

Choices

Choice (4) Response

a.

1

b.

12.5

c.

20

d.

50

Question number: 56

» Mental Ability » Basic Arithmetic

MCQ▾

Question

400 liters of milk is divided in two parts having ratio X: 20, if the first part is 200 liters, find x.

Choices

Choice (4) Response

a.

20

b.

42

c.

39

d.

41

Question number: 57

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Which of the following number is prime?

Choices

Choice (4) Response

a.

119

b.

247

c.

187

d.

All a. , b. and c. are correct

Question number: 58

» Mental Ability » Basic Arithmetic

MCQ▾

Question

The ratio of the number of boys and girls in a college is 5: 6. If the percentage increase in the number of boys and girls be 10 % and 15 % respectively, what will be the new ratio?

Choices

Choice (4) Response

a.

5: 9

b.

21: 22

c.

8: 9

d.

23: 24

Question number: 59

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Find the value of a in each of the following equations

11÷a10×0.2=11

Choices

Choice (4) Response

a.

0.5

b.

5.4

c.

0.6

d.

1.6

Question number: 60

» Mental Ability » Basic Arithmetic

MCQ▾

Question

An ore contain 5 % Iron. How many kilograms of the ore are required to get 70 kg of Iron?

Choices

Choice (4) Response

a.

1.44 kg

b.

850 kg

c.

544 kg

d.

1400 kg

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