Math Quantitative Aptitude
Math Quantitative Aptitude
151. Two numbers X and Y are respectively 20% and 28% less than a third number Z. By what percentage of the number Y less than the number X?
- 8 %
- 9 %
- 10 %
- 12 %
152. There are four envelopes, each carrying a specific address for each of the four different letters. If the letters are randomly put into envelopes, What is the probability that all the four letters will be put into their respective correctly addressed envelopes?
- 1/4
- 1/12
- 1/18
- 1/24
153. What is the total number of digits printed if a book containing 150 pages is to be numbered from 1 to 150?
- 262
- 342
- 360
- 450
154. A person travels three equal distances at a speed of x km/h, y km/h and z km/h respectively. What is the average speed for the whole journey?
- xyz (xy +yz + zx)
- (xy + yz + zx) Xyz
- 3xyz (xy +yz +zx)
- xyz 3(xy +yz +zx)
155. A person walks 12 km due North, then 15 km due East, after that 19 km due West, and then 15km due South. How far is he away from the starting point?
- 61 km
- 37 km
- 9 km
- 5 km
156. A cube of length one cm Is taken out from a cube of length 8 cm. What is the weight of the remaining portion?
- 7/8 of the weight of the original cube
- 8/9 of the weight of the original cube.
- 63/64 of the weight of the original cube.
- 511/512 of the weight of the original cube.
157. What are the maximum points of intersection of four circles such that no circle overlaps any other circle?
- 6
- 8
- 12
- None of these
158. The average of five consecutive numbers is x. If the next two numbers are also included, how shall the average vary?
- It shall increase by 1
- It shall remain the same
- It shall increase by 1.4
- It shall increase by 2
159. There are tables containing two drawers each. It is known that one of the tables contains a silver coin in each of its drawers, another table contains a gold coin in each drawer while the third table contains a silver coin in one drawer and a gold coin in the other. One of the drawers of a table is opened and found to contain a silver coin. What is the probability that the other drawer of that table contains a gold coin?
- 1
- 0.5
- 0.25
- 0.75
160. The square root of the cube of this number is the cube of its square root. It is not 1 and it is less than 6.What is it?
- 2
- 3
- 4
- 5