Mental AbilityBasic Arithmetic (NCO Cyber Olympiad (SOF) Class 6): Questions 1  8 of 268
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Question number: 1
» Mental Ability » Basic Arithmetic
Question
What is the least common factor (LCM) of 8 and 10?
Choices
Choice (4)  Response  

a.  40 

b.  80 

c.  16 

d.  24 

Question number: 2
» Mental Ability » Basic Arithmetic
Question
What is the least common factor (LCM) of 14 and 21?
Choices
Choice (4)  Response  

a.  42 

b.  21 

c.  70 

d.  45 

Question number: 3
» Mental Ability » Basic Arithmetic
Question
What is the least common factor (LCM) of 45 and 35?
Choices
Choice (4)  Response  

a.  90 

b.  45 

c.  54 

d.  30 

Question number: 4
» Mental Ability » Basic Arithmetic
Question
John charged Rs. 15.75 for each birdhouse he built. If the material costs Rs. 10.25 Per house, how much profit could he earn after selling five houses?
Choices
Choice (4)  Response  

a.  Rs. 78.75 

b.  Rs. 27.50 

c.  Rs. 25.50 

d.  Rs. 51.25 

Question number: 5
» Mental Ability » Basic Arithmetic
Question
The number that should replace the triangle so that the following forms a proportion is________.
12,21,8, ∆
Choices
Choice (4)  Response  

a.  18 

b.  16 

c.  14 

d.  20 

Question number: 6
» Mental Ability » Basic Arithmetic
Question
A number is divisible by 5 if, ________.
Choices
Choice (4)  Response  

a.  The last digit is 5 or 0 

b.  The sum of the digits is divisible by 5 

c.  The sum of the digits is divisible by 10 

d.  Question does not provide sufficient data or is vague 

Question number: 7
» Mental Ability » Basic Arithmetic
Question
11111  1111 + 111  11 + 1 is ________.
Choices
Choice (4)  Response  

a.  102 

b.  10101 

c.  12345 

d.  9901 

Question number: 8
» Mental Ability » Basic Arithmetic
Question
Which will be the digit in THOUSAND’S place in this given operation?
Choices
Choice (4)  Response  

a.  4 

b.  3 

c.  8 

d.  7 
