Question

i m a 2 digit number. the digit in my tens place is one more than the digit in my ones place. if i m a prime number ,what am i ?
A) 21
B) 43
C) 87
D) the number can be eigther 43 or 87

Answer 1

B) 43.............................................

Answer 2

let  the digit in tens place be x an d digit in units place be y
from condition given in question x=y+1
and condition second in question i.e. i am a prime number
the option D)the number can be either 43  or 87