Mental AbilityBasic Arithmetic (NCO Cyber Olympiad Class 9): Questions 14  19 of 49
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Question number: 14
» Mental Ability » Basic Arithmetic
Question
A truck travels 540 km from Surat to Ahmedabad at 54 km per hour but returns the same distance at 36 km per hour. The average speed for the round trip is closest to
Choices
Choice (4)  Response  

a.  35km/hr 

b.  34km/hr 

c.  44km/hr 

d.  43 km/hr 

Question number: 15
» Mental Ability » Basic Arithmetic
Question
Ramila got married 7 years ago. Today her age is times her age at the time of marriage. Her son’s age is times her age. Her son’s age is________
Choices
Choice (4)  Response  

a.  2.8 years 

b.  5 years 

c.  4.1 years 

d.  3.3 years 

Question number: 16
» Mental Ability » Basic Arithmetic
Question
Three years ago the average age of P and Q was 16 years. With R joining them, the average becomes 20 years. How old is R now?
Choices
Choice (4)  Response  

a.  22 years 

b.  34 years 

c.  45 years 

d.  12 years 

Question number: 17
» Mental Ability » Basic Arithmetic
Question
A man had 25 lamps. All but 15 broken, how many were left with him?
Choices
Choice (4)  Response  

a.  18 

b.  7 

c.  15 

d.  10 

Question number: 18
» Mental Ability » Basic Arithmetic
Question
In three colored boxespink purple, cyan orange and yellow aqua 180 balls are placed. There are twice as many balls in the orange and purple boxes combined as there are in the aqua box and twice as many in the aqua as there are in the purple box. How many balls are there in the orange box?
Choices
Choice (4)  Response  

a.  60 

b.  90 

c.  46 

d.  30 

Question number: 19
» Mental Ability » Basic Arithmetic
Question
How many liters of silicon solution should be added to 70 liters of a silicon solution to make a solution?
Choices
Choice (4)  Response  

a.  70 liters 

b.  80 liters 

c.  10 liters 

d.  20 liters 
