Question

if 15 feb 2010 was monday, what was day on 10 jan 2006​

Answer 1

Given that

 15 feb 2010 was Sunday

 on 31st December, 2005 it was Saturday.

 No. ofodd days from 2006 to 2009 = (1+1+2+1)

                                                               = 5 days

  On 31st December 2009, it was Thursday.

 It was Tuesday on Jan 10,2006.