4. Kirjuta kõik paarisarvud 2-st kuni 20-ni ja 180-st kuni 200-ni.
    2, ...........................................................................................................................
    ..............................................................................................................................

    180, .......................................................................................................................
    ..............................................................................................................................

5. Kirjuta järgmistest arvudest eraldi välja kõik arvud, mis jaguvad 2-ga, 5-ga, 10-ga.

    40                86                325                675                1 616                25 000
    22                98                362                692                3 000                30 590
    30                52                450                850                9 005                71 008
    32                50                142                1 500             1 205                540 000

2-ga: .........................................................................................................................
        ..........................................................................................................................
5-ga: .........................................................................................................................

.........................................................................................................................
10-ga: ........................................................................................................................
        ..........................................................................................................................

Arvud, mis jaguvad kõigi kolme arvuga: .........................................................................................................................

.........................................................................................................................

6. Kirjuta numbritest 0, 4, 5, 9 kolm neljakohalist arvu, mis jaguvad

    1) 2-ga .......................................................................................................................
    2) 5-ga ......................................................................................................................
    3) 10-ga ......................................................................................................................

7. Korrutamata tee kindlaks, kas arvude 148 ja 75 korrutis jagub 2-ga,
    5-ga. Põhjenda.
    .................................................................................................................................

8. Jagamata otsusta, missuguse jäägi saad arvu 27 346 jagamisel 5-ga, 10-ga?
    5-ga    ....................                                10-ga    .................................

9. Nuputa!

Kas tulemus on paarisarv või paaritu arv, kui

    1) liidetakse paarisarv paaritu arvuga? ...............................................
    2) liidetakse kaks paaritut arvu? ........................................................
    3) korrutatakse paarisarv paaritu arvuga? ...........................................
    4) korrutatakse kaks paaritut arvu? ...................................................
    5) liidetakse 3 paarisarvu ja 4 paaritut arvu? ......................................
    6) liidetakse 4 paarisarvu ja 3 paaritut arvu? ......................................