The word decreased indicates the use of subtraction, so to figure out our answer we do the opposite, -1 + 24 = 23, after that we then subtract, 23 - 24 = -1, there for your answer should be 23 - 24 = -1, or more simply the number that has to be decreased to make the statement true is 23
Even integer: 2 x a, where a is a natural number without 0; Odd integer : 2 x b + 1 , where b is a natural number; So, 2 x a + 2 x b+ 1 = 2 x ( a + b ) + 1, which is an odd integer.
