Civil Services UPSC EPFO (EO/AO) Mock Test 2023 Quantitative Aptitude Ratio and Proportion Componendo or Dividendo
For the value of 'k' (k>0), is subtracted from each of 30, 20, 12 and 11, the numbers obtained in this order are in proportion. Find the first proportional for (k2 - kz), (k + z) and (k2 - z2).
1
10
2
30
3
12
4
11