What is the missing number? 1350,1150, \( \qquad \) 750

1. Let the four numbers in the sequence be \( a = 1350 \), \( b = 1150 \), \( c \) (the missing number), and \( d = 750 \). 2. Assuming the sequence is arithmetic, the difference between consecutive terms is constant. Let the common difference be \( r \). Then: \[ b = a + r, \quad c = b + r, \quad d = c + r. \] 3. We have: \[ b = 1350 + r = 1150 \quad \Rightarrow \quad r = 1150 - 1350 = -200. \] 4. Now, calculate the missing term \( c \): \[ c = b + r = 1150 + (-200) = 950. \] 5. Thus, the missing number is \( \boxed{950} \).