if 1 is subracted from a numberthen that becomes perfect square which number will not be the last digit of number.
a)0
b)2
c)4d)8

• In ques he said if 1 no. Is subtracted from the number.
  According to that 3 and 4 both option are correct.
  Bcoz first digit of perfect square is 0,1,4,5,6,9
• 11 years agoHelpfull: Yes(29) No(4)
• d)8. because perfect square of the num never end with 2,3,7,8.
  here if subtracted 8-1=7. it will never result in perfect square.
• 10 years agoHelpfull: Yes(10) No(2)
• c,d will satisfy the given condition
  
• 11 years agoHelpfull: Yes(6) No(2)
• ans is b) 2 becoz for a perfect square 2 cannot be unit digit
• 11 years agoHelpfull: Yes(4) No(25)
• i think it is c,d
  
• 11 years agoHelpfull: Yes(3) No(2)
• the answer is c)4
  if 0 the no could be 10-1=9 possible
  if 2 ,, , ,, ,, 82-1=81 ,,
  if 8 ,, ,, ,, ,, 28-1=27 ,,
  only if it is 4 the no 4-1=3 that is not possible
• 10 years agoHelpfull: Yes(3) No(4)
• perfect square never ends in 2 or 3 so
  ans:2
• 10 years agoHelpfull: Yes(1) No(1)
• Ayush read the question carefully...
• 10 years agoHelpfull: Yes(1) No(0)
• if the last digit is zero :
  Example 10 = 10 -1 = 9 (perfect square )
  if the last digit is two :
  Example 82 = 82-1 =81 (perfect square )
  but the options c and d cannot be the last digits
• 10 years agoHelpfull: Yes(1) No(1)
• as 0 1 4 5 6 9 are the unit digit nu of perfect square.so acoording to question unit digit should be 1 2 5 7 0 as 1 is subtracted.so c,d is the ans.
• 10 years agoHelpfull: Yes(1) No(0)
• d) 8
  becoz if we subtract 8-1=7 which not yield a perfect square
• 6 years agoHelpfull: Yes(0) No(0)