Mental AbilityBasic Arithmetic (NCO Cyber Olympiad Class 6): Questions 59  64 of 268
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Question number: 59
» Mental Ability » Basic Arithmetic
Question
Hiral think of a number then she subtract 5 from it and multiply the answer by 4. Let the resulting number be X. Starting with X, how can she get the original number back?
Choices
Choice (4)  Response  

a.  Multiply X by 5 and then subtract 4 from the result 

b.  Divide X by 4 and then add 5 to the result 

c.  Divide X by 4 and then subtract 5 from the result 

d.  Multiply X by 4 and then add 5 to the result 

Question number: 60
» Mental Ability » Basic Arithmetic
Question
The number that should replace the triangle so that the following forms a proportion is________.
23, 56, 42, ∆
Choices
Choice (4)  Response  

a.  105 

b.  100 

c.  102 

d.  104 

Question number: 61
» Mental Ability » Basic Arithmetic
Question
is equivalent to ________.
Choices
Choice (4)  Response  

a.  50% 

b.  30% 

c.  25% 

d.  75% 

Question number: 62
» Mental Ability » Basic Arithmetic
Question
I think of a number, add 10 to it and divide the answer by 2. Let the resulting number be X. Starting with X, how can I get my original number back?
Choices
Choice (4)  Response  

a.  Add 2 to X and then divide the resulting number by 10 

b.  Multiply X by 2 and then add 10 to the result 

c.  Divide X by 2 and then add 10 to the result 

d.  Multiply X by 2 and then subtract 10 from the result 

Question number: 63
» Mental Ability » Basic Arithmetic
Question
How many numbers from 45 to 86 divisible by 9?
Choices
Choice (4)  Response  

a.  5 

b.  3 

c.  4 

d.  7 

Question number: 64
» Mental Ability » Basic Arithmetic
Question
If all the numbers from 12 to 110 which are divisible by 12 are arranged in descending order then which number will be at 8 ^{th} place?
Choices
Choice (4)  Response  

a.  84 

b.  24 

c.  12 

d.  96 
