Quantitative Aptitude
Find the number of common tangents, if r1 + r2 = C1C2 (With usual notations, r1 & r2 and C1, & C2, are the radii and centres of the two circles.
If \(
x + \frac{1}{x} = -14, \quad \text{and } x < -1,
\) what will be the value of \(
x^{2} - \frac{1}{x^{2}}
\)
Study the given table and answer the question that follows.
The table shows number of donuts sold by 3 different stores in 5 different months.
Store |
Month
|
||||
July | August | September | October | November | |
P | 400 | 350 | 263 | 125 | 420 |
Q | 660 | 170 | 465 | 905 | 180 |
R | 342 | 182 | 700 | 960 | 235 |
What is the ratio of the total number of donuts sold by stores P and R together in October to the total number of donuts sold by stores Q and R together in the same month?
0.5 is what percentage of 20?