The average of the two-digit numbers, which remain the same when the digits interchange their positions, is (a) 33        (b) 44      (c) 55         (d) 66

Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers ?

The number of two digit prime number which remain prime even on inverting the position of its digits is :

The sum of the digits of a two-digit number is 9. If 27 is subtracted from the number, then the digits interchange their places. Find the number

The sum of the digits of a two digit number is 7. If 9 is added to the number, the digits interchange their places. Find the number

The sum fo digits of a two-digits number is 9.If 27 is subtracted from the number then digit interchange their places. Find the number.

The product of digits of a two digit number is 30. When 9 is subtracted from the number,the digits interchange the places.Find the number.

The average of nine 2 digit numbers is decreased by 6 when the digits of one of the 2 digit numbers is interchanged. Find the difference between the digits of that number.

The average of nine 2 digit numbers is decreased by 6 when the digits of one the 2 digit numbers is interchanged. Find the difference between the digits of that number.

The sum of two digits of a number is 15. If 9 is added to the number,the digits are interchanged.What is the number? (A) 69 (B) 87 (C)96 (D) 78