unable to understand if a b and c are 3 consecutive integers between -10 to+1 ( both inclusive), how many integer values are possible for the expression ((a^3+b^3+c^3+3abc)/(a+b+c)^2)

unable to understand if a b and c are 3 consecutive integers between -10 to+1 ( both inclusive), how many integer values are possible for the expression ((a^3+b^3+c^3+3abc)/(a+b+c)^2)

unable to understand didnt understand solution please elaborate the solution with step by step

unable to understand didnt understand solution please elaborate the solution with step by step

unable to understand If Labour  1 and 2 construct a room while Labour  3 demolish it, the room will be built entirely from the ground up in 5 days. It takes seven days to build a room from start if labourers 1 and 3 construct it while labourer 2 demolish it. It takes 35 days to build a room from scratch if Labour 2 and Labour 3 construct it while Labour 1 demolish it. How many days will it take them all together to construct the room from the ground up? Assume that it takes the same amount of days for each of them to fully ruin a room that has been constructed to 100% completion as it does to start from scratch.

unable to understand If Labour  1 and 2 construct a room while Labour  3 demolish it, the room will be built entirely from the ground up in 5 days. It takes seven days to build a room from start if labourers 1 and 3 construct it while labourer 2 demolish it. It takes 35 days to build a room from scratch if Labour 2 and Labour 3 construct it while Labour 1 demolish it. How many days will it take them all together to construct the room from the ground up? Assume that it takes the same amount of days for each of them to fully ruin a room that has been constructed to 100% completion as it does to start from scratch.