Mental AbilityBasic Arithmetic (NCO Cyber Olympiad (SOF) Class 9): Questions 29  34 of 49
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Question number: 29
» Mental Ability » Basic Arithmetic
Question
Question when simplified is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 30
» Mental Ability » Basic Arithmetic
Question
In three colored boxespink, cyan and yellow 240 balls are placed. There are thrice as many balls in the cyan, pink boxes combined as there are in the yellow box, and twice as many in the yellow as there are in the pink box. How many balls are there in the yellow box?
Choices
Choice (4)  Response  

a.  36 

b.  50 

c.  60 

d.  30 

Question number: 31
» Mental Ability » Basic Arithmetic
Question
Divide 116 among four parts such that 5 added to first part, 4 subtracted from second part, third multiplied by 3 and the fourth divided by2 are all equal.
Choices
Choice (4)  Response  

a.  24,36,72,90 

b.  22,31,9, 54 

c.  15,30,45,60 

d.  32,21,9, 60 

Question number: 32
» Mental Ability » Basic Arithmetic
Question
The sum of two angles of a triangles is 80° and their difference is 10°, find all the angles of the triangle.
Choices
Choice (4)  Response  

a.  25°, 35°, 110° 

b.  60°, 58°, 70° 

c.  45°, 45°, 90° 

d.  45°, 35°, 100° 

Question number: 33
» Mental Ability » Basic Arithmetic
Question
How much pure alcohol should be added to 400ml of a 15 % solution to make its strength 32%?
Choices
Choice (4)  Response  

a.  100 ml 

b.  95 ml 

c.  90 ml 

d.  80 ml 

Question number: 34
» Mental Ability » Basic Arithmetic
Question
Given, , and find the value of the following expression correct up to three places of decimal: .
Choices
Choice (4)  Response  

a.  3.78 

b.  3.88 

c.  2.88 

d.  2.67 
