Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad Class 9): Questions 20 - 26 of 49

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Question number: 20

» Mental Ability » Basic Arithmetic

MCQ▾

Question

In a family, the uncle took 16 of the lava cake and he had 6 times as much as each of the other members had. The total number of family member is ________

Choices

Choice (4) Response
a.

43

b.

31

c.

39

d.

21

Question number: 21

» Mental Ability » Basic Arithmetic

MCQ▾

Question

The ratio of the ages of Neeta and Ravi is 2: 5. After 8 years, their ages will be in the ratio of 1: 2. The difference in their present age is: (in years)

Choices

Choice (4) Response
a.

32

b.

24

c.

29

d.

26

Question number: 22

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A man had 30 mobiles. All but 8 mobile not working, how many was he left with?

Choices

Choice (4) Response
a.

17

b.

21

c.

77

d.

22

Question number: 23

» Mental Ability » Basic Arithmetic

MCQ▾

Question

How many liters of 80% nitrogen solution should be added to 20 liters of a 40% nitrogen solution to make a 60% solution?

Choices

Choice (4) Response
a.

20 liters

b.

30 liters

c.

90 liters

d.

60 liters

Question number: 24

» Mental Ability » Basic Arithmetic

MCQ▾

Question

In a pure platinum solution quantity of Sterling platinum is 90.2% . How many grams of sterling platinum must be mixed to a 80% platinum alloy to obtain a 500 gm of a 91% platinum alloy?

Choices

Choice (4) Response
a.

650 gm

b.

548 gm

c.

439 gm

d.

539 gm

Question number: 25

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A shepherd had 17 sheep. All but nine died. How many was he left with?

Choices

Choice (4) Response
a.

8

b.

17

c.

9

d. None of the above

Question number: 26

» Mental Ability » Basic Arithmetic

MCQ▾

Question

logp+logq=log(p+q) Only if

Choices

Choice (4) Response
a.

p=qq1

b.

p=q=1

c.

p=q=0

d.

p=q21q

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