# CDS Maths(1) Questions and answers

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These are the list of questions asked in the previous year CDS Maths Exams. You can practice these questions as real time exam in this link.

11). The difference between compound interest and simple interest for 2 years at the rate of 10% over principal amount of z X is z 10. What is the value of X ?
 A). RS.100 B). RS.1,000 C). RS.500 D). RS.5,000
12). A sum of money becomes 3 times in 5 years at simple interest. In how many year will the same sum become 6 times at the same rate of simple interest? (
 A). 10 years B). 12 years C). 12.5 years D). 10.5 years
13). A man buys 200 oranges for Rs.1,000. How many oranges for Rs.100 can he sell to that his profit percentage is 25%?
 A). 10 B). 14 C). 16 D). 20
14). If m% of m + n =2% of (m X n), then what percentage of m is n ?
 A). 50% B). 75% C). 100% D). Cannot be determined due to insufficient data
15). If the side of a cube is increased by 100% then by what percentage is the surface area of the cube increased?
 A). 150% B). 200% C). 300% D). 400%

16). How many pairs. M p positive integers $$m$$ and $$n$$ satisfy the equation $$\Large \frac{1}{m}$$+$$\Large \frac{4}{n}$$= $$\Large \frac{1}{12}$$
Where $$n$$ is an odd integer less than 60?

 A). 7 B). 5 C). 4 D). 3
17). The sides of a triangle are in the ratio $$\Large \frac{1}{2}$$ : $$\Large \frac{1}{3}$$ : $$\Large \frac{1}{4}$$ If its perimeter is 52 cm, then what is the length of the smallest side?
 A). 9 cm B). 10 cm C). 11 cm D). 12 cm
18). The diameter of a metallic sphere is 6 cm. The sphere is melted and drawn into a wire of uniform circular cross-section. If the length of the wire is 36 m, then what is its radius equal to ?
 A). 0.1 cm B). 0.01 cm C). 0.001 cm D). 1.0 cm
19). Consider all those two-digit positive integers less than 50, which when divided by 4 yield unity as remainder. What is their sum?
 A). 310 B). 314 C). 318 D). 323
20). If every side of an equilateral triangle is doubled. then the area of new triangle becomes I: times the area of the old one. What is h equal to ?
 A). $$\sqrt{3}$$ B). 2 C). 4 D). 8
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