Chapter 1 Revision - Number

Which of these numbers is NOT a prime number (primtal)?

• 2

• 3

• 4

• 5

Dela upp 42 i primfaktor.

• 6 x 7

• 1 x 6 x 7

• 1 x 2 x 3 x 7

• 2 x 3 x 7

If I was to find the differens of two numbers, what would I do?

• +

• -

• x

• 3

• 39

• 51

• -3

5 - 9 = ?

• 4

• 14

• -4

• -14

20/4 + 15/5 = ?

• 8

• 9

• 10

• 11

-4 + 2 =

• -6

• -2

• 2

• 6

-3 - 8 =

• -11

• -5

• 5

• 11

• 0,1

• 0,2

• 0,5

• 5

• 0,5

• 0,05

• 1,55

• 5