Mathematics

4 workers complete a job in 20 days. At the same rate, how many days will 4 workers take?

5 workers complete a job in 20 days. At the same rate, how many days will 4 workers take?

5 workers complete a job in 12 days. At the same rate, how many days will 4 workers take?

3 workers complete a job in 12 days. At the same rate, how many days will 3 workers take?

North region sales in three months are 120, 150 and 180. What is the total?

South region sales are 100, 140 and 160. What is the range?

East region sales in three months are 80, 120 and 140. What is the total?

West region sales are 150, 130 and 170. What is the range?

Solve x/200=396. x?

If x+352=178, x?

(109+214)²?

(21+38)²?

Solve x/196=388. x?

Solve x/144=284. x?

If x=175, y=346, x+y?

If x=159, y=314, x+y?

Solve x/192=380. x?

If x=151, y=298, x+y?

If x+392=198, x?

If x+256=130, x?

If x=67, y=130, x+y?

If x=135, y=266, x+y?

Solve x/188=372. x?

(105+206)²?

If x+104=54, x?