Question

In a two digit number the sum of the digits is telling even number with the order of the digit is 28 greater then voice of the units digit of the original number find the number

Answer 1

(seven) is the natural number following 6 and preceding 8. ... 7 is the only number D for which the equation 2n − D = x2 has more than two ... 7 is the last digit of Graham's number