-18
81
The sum of 162 and 81 is 243.
81*82/2= 3321
x2 + 63
87
The answer to this problem is 703.
Sometimes. 13/4 plus 63/4 = 81/2 13/4 plus 61/4 = 8
9n + 18 = 81 9n = 63 n = 7
tan(9) + tan(81) - tan(27) - tan(63) = 4
7(7 + 9)
3(5 + 27)
Possibility of two digit no whose sum is 9 18,27,36,45,54,63,72,81 Now add 63 to each no mentioned above output is 81,90,99,108,117,126,135,144 See 18 and 81. If you reverse 18 . 81 will come which is the no increased by 63. 18 is