176. If A and B are in the ratio 4 : 5 and the difference of their squares is 81, what is the value of A?
177. If the measure of three angles of a triangle are in the ratio 2 : 3 : 5, then the triangle is :
178. If 4 men or 8 women can do a piece of work in 15 days, in how many days can 6 men and 12 women do the same piece of work ?
179. A certain sum will amount to 12,100 in 2 years at 10% per annum of compound interest, interest being compounded annually. The sum is
180. The cost price of 100 books is equal to the selling price of 60 books. The gain or loss percentage will be :
181. Find a simple discount equivalent to a discount series of 10%, 20% and 25%.
182. G is the centroid of ΔABC. The medians AD and BE intersect at right angles. If the lengths of AD and BE are 9 cm and 12 cm respectively: then the length of AB (in cm) is
183. If θ be acute angle and tan (4θ - 50°) = cot(50° - θ), then the value of 9 in degrees is:
184. Let $$C_1$$ and $$C_2$$ be the inscribed and circumscribed circles of a triangle with sides 3 cm, 4 cm area of C, and 5 cm then $$\frac{area of C_1}{area of C_2}$$
185. A train 180 metres long is running at a speed of 90 km/h. How long will it take to pass a post ?
186. The difference between successive discounts of 40% followed by 30% and 45% followed by 20% on the marked price of an article is Rs. 12. The marked price of the article is :
187. If 5 sinθ = 3, the numerical value of $$\frac{\sec\theta-\tan\theta}{\sec\theta+\tan\theta}$$ is
188. A train runs at an average speed of 75 km/hr. If the distance to be covered is 1050 kms, how long will the train take to cover it ?
189. If a person travels from a point L towards east for 12 km and then travels 5 km towards north and reaches a point M, then shortest distance from L to M is :
190. An article which is marked at Rs. 975 is sold for Rs.897. The discount percent is
191. If the altitude of an equilateral triangle is 12√3 cm, then its area would be :
192. What is the arithmetic mean of first 20 odd natural numbers ?
193. The HCF of $$x^{8}-1$$ and $$x^{4}+2x^{3}-2x-1$$ is
194. If secθ + tanθ = p, (p ≠ 0) then secθ is equal to
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