Mental AbilityBasic Arithmetic (NCO Cyber Olympiad Class 9): Questions 20  25 of 49
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Question number: 20
» Mental Ability » Basic Arithmetic
Question
In a family, the uncle took 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
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
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
Question
How many liters of nitrogen solution should be added to 20 liters of a nitrogen solution to make a solution?
Choices
Choice (4)  Response  

a.  20 liters 

b.  30 liters 

c.  90 liters 

d.  60 liters 

Question number: 24
» Mental Ability » Basic Arithmetic
Question
In a pure platinum solution quantity of Sterling platinum is . How many grams of sterling platinum must be mixed to a platinum alloy to obtain a 500 gm of a 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
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 
