A cup holds $200$ ml to the nearest ml, and a large container holds $86$ litres to the nearest litre. What is the smallest possible number of cupfuls? What is the largest possible number of cupfuls of water needed to fill the container?

Calculate upper and lower bounds for the area of the triangle. The two short sides of a right-angled triangle are $3.7 cm$ (to nearest mm) and $4.5 cm$ (to nearest mm). Give your answers to the nearest cm.

Calculate upper and lower bounds for the length of the hypotenuse. The two short sides of a right-angled triangle are $3.7$cm (to nearest mm) and $4.5$cm (to nearest mm). Give your answers to the nearest cm. 

Calculate upper and lower bounds for $x$.The angles in a triangle are $x°, 38.4°$ (to $1 d.p.$) and $78.1°$ (to $1 d.p.$).

Calculate upper and lower bounds for $x$ as a percentage of $y$ to $1$ decimal place.Quantity $x$ is $45$ to the nearest integer. Quantity $y$ is $98$ to the nearest integer.  

The following five masses are given to $3$ significant figures. Calculate upper and lower bounds for the mean of these masses. 

$138$kg, $94.5$ kg, $1090$ kg ,$345$ kg, $0.354$ kg