# Circle + subtraction - practice problems

#### Number of problems found: 23

- Circles

How many different circles are determined by 9 points at the plane if 6 of them lie in a straight line? - The coil

How many ropes (the diameter 8 mm) fit on the coil (threads are wrapped close together) The coil has dimension: the inner diameter 400mm, the outside diameter 800mm and the length of the coil is 470mm - Metal balls

Four metal balls with a diameter of 5 cm are placed in a measuring cylinder with an inner diameter of 10 cm. What is the smallest water volume to be poured into the cylinder so that all balls are below the water level?

We apologize, but in this category are not a lot of examples.

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Circle practice problems. Subtraction practice problems.