Answer: 1860

Explanation:
Number of candidates qualified from Hyderabad in 2004
=> 17% of 51124 = 8691
=> Number of candidates qualified from Hyderabad in 2005
=> 21% of 50248 = 10552
=> So, required difference = 10552 – 8691
=> = 1861 equivalent to 1860

Answer: 28150

Explanation:
Number of candidates qualified from Delhi in 2005
=> 28% of 58248 = 16309
=> Number of candidates qualified from Delhi in 2009
=> 20% of 59216
=> 11843
=> Required number = 16309 + 11843 = 28152 i.e. 28150

Answer: 2010

Explanation:
Number of candidates qualified from Chennai in the year
=> 2005 = 35145 – 17264 = 17881
=> 2006 = 24800 – 17264 = 7536
=> 2007 = 28316 – 24800 = 3516
=> 2008 = 36503 – 28316 = 8187
=> 2009 = 36503 – 29129 = 7374
=> 2010 = 32428 – 29129 = 3309 

Answer: 2010

Explanation:
Number of candidates qualified from Chennai in the year
=> 2004 = 37346 x 0.09 = 3361
=> 2005 = 48932 x 0.12 = 5872
=> 2006 = 51406 x 0.10 = 5141
=> 2007 = 52315 x 0.08 = 4135
=> 2008 = 55492 x 0.13 = 7214
=> 2009 = 57365 x 0.11 = 6310
=> 2010 = 58492 x 0.14 = 8189 

Answer: 13540

Explanation:
number of candidates qualified from Kolkata in the year 2007
=> = 71253 x 0.19
=> 13538
=> 13540