The number system

Answer all the questions below and press submit to see how many you got right.

id: 13329

Select all natural numbers.

  • 0.64
    -15
    $\frac{3}{45}$
    90
id: 13352

Select all statements that are true about the natural number 17.

  • Dividing 17 by any natural number has a natural number as a result.
    Subtracting any natural number from 17 has a natural number as a result.
    Multiplying any natural number by 17 has a natural number as a result.
    Adding any natural number to 17 has a natural number as a result.
id: 13342

Select all statements that are true about the natural number 31.

  • Multiplying any natural number by 31 has a natural number as a result.
    Adding any natural number to 31 has a natural number as a result.
    Subtracting any natural number from 31 has a natural number as a result.
    Dividing 31 by any natural number has a natural number as a result.