explain the ans

A: equation 1990x - 173y = 11 has no solutions in integers for x,y.
B: there exists only one prime number p such that (17p+1) is a perfect square.

which are correct

A, B, Both, Neither

• updated...
  B is correct.
  
  A: equation 1990x - 173y = 11 is satisfied by x=22 and y= 253
  Its a bit tricky one.
  At x=2 and y= 23; 1990x - 173y =1
  At x=4 and y= 46; 1990x - 173y =2
  At x=6 and y=69; 1990x - 173y =3
  At x=8 and y=92; 1990x - 173y =4
  At x=10 and y=115; 1990x - 173y =5
  Thus its a series...
  So, Procedding in the same way....
  At x=22 and y=253; 1990x - 173y =11
  
  B: there exists only one prime number p such that (17p+1) is a perfect square.
  At p=19
  17*19+1=324=18^2
  
  
• 9 years agoHelpfull: Yes(4) No(0)
• @Siddarth
  
  Can you please expalin statement B clearly.
• 9 years agoHelpfull: Yes(2) No(0)
• B is correct.
  A: equation 1990x - 173y = 11 is satisfied by x=22 and y= 253
  
  B: there exists only one prime number p such that (17p+1) is a perfect square.
  17*15+1=256=16^2
  
• 9 years agoHelpfull: Yes(0) No(2)
• @SIDDHARTH PRAKASH SINGH
  
  A: how did u get values of x,y//// x=22 and y= 253 explain!
  B: 15 is not prime
• 9 years agoHelpfull: Yes(0) No(0)