11.5
Wiki User
∙ 10y ago(1/2) + (2/3) + (3/4) = (6/12) + (8/12) + (9/12) = 23/12= 1 and 11/12
add 9 add 1 subtract 20 add 9 add 1
-8
the next number in the sequence is 25............starting at the beginning, you add the odd numbers to the existing number to get the answer. Add "1" to 0, get 1; add "3" to 1, get 4; add "5" to 4, get 9; add "7" to 9 to get 16........and add "9" to 16 to get 25.........
When you add -9 and +10, you get (+) 1.
The two numbers are 1 and -9
-1
the answer is 1+9 =10,2+9=1.The trick is one less and add an one in frount of it.
10
-1
51
3, looks as if you add 9 to the first number, then add 1, divide by 5, add 9, add 1, divide by 5 to get 3