MathematicsRational Numbers (NTSE Stage1 (StateLevel) ScholasticAptitude & Language Comprehension): Questions 7  11 of 13
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Question number: 7
» Mathematics » Rational Numbers
Question
20 L of a mixture contains milk and water in the ratio 5: 3. If 4 L of this mixture are replaced by 4 L of milk, the ratio of milk to water in the new mixture will become
Choices
Choice (4)  Response  

a.  9: 7 

b.  8: 3 

c.  4: 6 

d.  7 : 3 

Question number: 8
» Mathematics » Rational Numbers
Question
A merchant advertises 10 % off on the items bought from his store. The total discount got by a customer who bought a suitcase worth Rs. 560, a bag worth Rs. 90 and a towel worth Rs. 45 is
Choices
Choice (4)  Response  

a.  Rs. 71.50 

b.  Rs. 69.50 

c.  Rs. 70 

d.  All of the above 

Question number: 9
» Mathematics » Rational Numbers
Question
ABC is a triangle and AD is perpendicular to BC. It is given that the length of AB, BC and CA are all rational numbers. Which of the following is correct?
Choices
Choice (4)  Response  

a.  AD and BD must be rational 

b.  BD must be rational but AD need not be rational 

c.  AD must be rational but BD need not be rational 

d.  Neither AD nor BD need be rational 

Question number: 10
» Mathematics » Rational Numbers
Question
Which of the following is rational?
Choices
Choice (4)  Response  

a.  Radius of a circle with circumference 

b.  Circumference of a circle with radius 

c.  Radius of a circle with area 

d.  Area of a circle with radius 

Question number: 11
» Mathematics » Rational Numbers
Question
A sum of Rs. 1550 was lent partly at and partly at simple interest. The total interest received after 3 year was Rs. 300. The ratio of money lent at to is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

