The least number by which 5*15*13*26 should be multiplied to make it a perfect square ?? Is there any shortcut to understand this of questions in exams ? ?

• if we expand the multiplication like 5*(5*3)*13*(13*2)
  then we have two 13, two 5 . we need two 3 and two 2 to make it a perfect square so u can multiply by 6.
• 10 years agoHelpfull: Yes(1) No(0)
• first expnd it like 5*(5*3)*13*(13*2)=5^2*13^2*6
  now,use property of perfect squares i.e when we multiply two or more perfect squares answer always be a perfect square..multiply by 6 in (5^2*13^2*6) to make it perfect square
  answer =6
• 10 years agoHelpfull: Yes(0) No(0)