Mental Ability (NCO Cyber Olympiad Class 7): Questions 149  154 of 205
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Question number: 149
» Mental Ability » Basic Statistics
Question
Match the reciprocal of each of the following in exponential form:ListⅠ  ListⅡ 
(A)
 (i)

(B)
 (ii)

(C)
 (iii)

(D)
 (iv)

Choices
Choice (4)  Response  

 
a. 


b. 


c. 


d. 


Question number: 150
» Mental Ability » Number Games » Number Analogies
Question
On dividing a number by 4, we get 3 as remainder. What will be the remainder, when the square of this number is divided by 4?
Choices
Choice (4)  Response  

a.  0 

b.  1 

c.  2 

d.  5 

Question number: 151
» Mental Ability » Basic Arithmetic
Question
The present ages of three persons in proportions 2: 3: 4. Five years ago, the sum of their ages was 48. Find their present ages (in years).
Choices
Choice (4)  Response  

a.  16, 28, 26 

b.  8, 20, 28 

c.  14, 21, 28 

d.  None of the above 

Question number: 152
» Mental Ability » Basic Arithmetic
Question
Two poles 30 m and 15 m high stand upright in a ground. If their feet are 36 m apart, find the distance between tops.
Choices
Choice (4)  Response  

a.  30 m 

b.  39 m 

c.  35 m 

d.  25 m 

Question number: 153
» Mental Ability » Basic Arithmetic
Question
A boat covers a certain distance downstream in 2 hour, while it comes back in 1 hours. If the speed of the stream be 5 kmph, what is the speed of the boat in still water?
Choices
Choice (4)  Response  

a.  25 kmps 

b.  35 kmps 

c.  12 kmps 

d.  11 kmps 

Question number: 154
» Mental Ability » Basic Algebra
Question
Step 1:
Step 2:
Step 3:
Are the above given steps a simplification of algebraic expression
Choices
Choice (4)  Response  

a.  Only step 1 is correct 

b.  Only step 1 and 2 are correct 

c.  No 

d.  Yes 
