Following are some pairs of integers .Observe the following table and complete it .
`"Statement" " ""Obervation"`
(i) `17 +23 =40 " " "Result is an integer"`
(ii) `-10+3=... " " ......................`
(iii) `(-75)+18= ...... " " .......`
(iv) `19 +(-25)=-6 " " "Result is an integer"`
(v) `27+(-27)=..... " " ............ `
(vi) `(-20)+0=...... " ".............`
(vii) `(-35)+(-10)=........ " " .........`
What do you observe ? Is the sum of two intergers always an integer? Did you find a pair of integers whose sum is not an integer ?