Which is the smallest no which divides 2880 and gives a perfect
square?
a) 4 b) 9 c) 3 d) 5

• 2880=20*144(because w.k.t 144 is perfect square)
  =2*10*144
  =2*2*5*144
  =4*5*144(here 4 and 144 are perfect square)
  so the smallest number is option ( d ). 5
• 13 years agoHelpfull: Yes(5) No(1)
• 2880/4=745(it is not square)
  2880/9=320(it is not square)
  2880/3=960(it is not square)
  2880/5=576(it is a perfect square)
  
  so
  ans is d)5
• 9 years agoHelpfull: Yes(1) No(0)
• The answer is 6 which is not there in option because it is based on the test of divisiblity rules for 6 has two rles as follows
  1st rules divisiblity by 2 (its unit digit is any of 0,2,4,6,8,10...even numbers)
  2nd rules divisiblity by 3 (sum of all digis i.e 2+8+8+0=18 so 18 is divisible by 3)
  so the ans is 6
• 8 years agoHelpfull: Yes(0) No(1)