Mental Ability (NCO Cyber Olympiad Class 9): Questions 205  209 of 219
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Question number: 205
» Mental Ability » Basic Algebra
Question
Which expression describes the area in square units of a rectangle that has a width of and a length of ?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 206
» Mental Ability » Basic Algebra
Question
A 108cm piece of wire was cut into equal segments, which were then soldered at the ends to form the edges of a cube. What is the volume of the cube?
Choices
Choice (4)  Response  

a.  648 cm3 

b. 


c. 


d. 


Question number: 207
» Mental Ability » Basic Algebra
Question
Rahul has a broken fan belt on his car. The belt goes around 2 pulleys, whose centers are 15 cm apart and each pulley is 4 cm in diameter. How long should the belt be?
Choices
Choice (4)  Response  

a.  45.6 cm 

b.  42.6 cm 

c.  40 cm 

d.  45 cm 

Question number: 208
» Mental Ability » Basic Algebra
Question
A Stadium contained an equal number of boys and girls. 15 girls left to play tennis, leaving twice as many boys as girls in the Stadium. Then the number of students in the Stadium originally was________
Choices
Choice (4)  Response  

a.  40 

b.  70 

c.  60 

d.  15 

Question number: 209
» Mental Ability » Basic Algebra
Question
Which of the equations below represents the second step of the solution process?
Step 1.
Step 2. ________
Step 3.
Step 4.
Step 5.
Step 6.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

