Mathematics Challenge Wiskunde-uitdaging Umceli ... - AMESA

22. Here is a subtraction problem, but the problem ismissing:??– ??63How many different two-digit subtraction problemscould have the answer 63?Grade 5 (Final Round) page 6 of 622. Hier is ’n aftrek-probleem, maar die probleem isuitgelaat:??– ??63Hoeveel verskillende twee-syfer aftrek-probleme kandie antwoord 63 hê?(A) 15 (B) 20 (C) 25 (D) 26 (E) 2723. In a class of 50 children there are boys and girls whoare 10 or 11 years old. Fourteen are 10-year-old girls,31 are boys and 18 are 11 years old. How many are11-year-old boys?23. In ’n klas van 50 kinders is daar meisies en seuns watof 10 of 11 jaar oud is. Veertien is 10-jarige meisies,31 is seuns en 18 is 11 jaar oud. Hoeveel is 11-jarigeseuns?(A) 13 (B) 14 (C) 31 (D) 5 (E) 1824. Sipho builds a sequence of triangular patterns withmatches as shown. In T 1 there is one triangle and inT 2 there are four triangles. How many triangles willthere be in T 10 ?22. Nasi isibalo sokuthabatha, kodwa amanani asoakabonakali:??– ??63Zingaphi izibalo zokuthabatha ezisebenzisa amananiane dijithi ezimbini ezinokuba nesiphumo sama 63?23. Kwiklasi yabantwana abangama 50 kukho amakhwenkwenamantombozana aneminyaka eli 10 okanye eli 11ubudala. Abali 14 ngamantombaza aneminyaka eli 10ubudala, abangama 31 ngamakhwenkwe baze abali 18babe neminyaka eli 11 ubudala. Mangaphi amakhwenkweaneminyaka eli 11 ubudala?24. U Sipho wathi wokha imizobo yonxantathu24. Sipho bou ’n ry driehoekpatrone met vuurhoutjiesT 1 T 2 T 3soos hieronder. In T 1 is daar een driehoek en in T 2 isdaar vier driehoeke. Hoeveel driehoeke is daar inT 10 ?esebenzisa imicinga njengokuba kubonisiwe.Kumzobo T 1 kukho unxantathu omnye kuzekumzobo T 2 kubekho oonxantathu abane. Ingabakuyakubakho oonxantathu abangaphi kumzobo T 10 ?(A) 30 (B) 60 (C) 121 (D) 120 (E) 10025. In question 24, T 1 has three matches and T 2 has9 matches. How many matches does Sipho need tobuild pattern T 10 ?25. In vraag 24: T 1 het drie vuurhoutjies en T 2 het9 vuurhoutjies. Hoeveel vuurhoutjies het Sipho nodigom T 10 te bou?(A) 150 (B) 180 (C) 135 (D) 165 (E) 30025. Kumbuzo wama 24, umzobo T 1 umenicingaemithathu uze umzobo T 2 ube nemicinga eli 9.Mingaphi imicinga ayidingayo u Sipho ukuze akwaziukokha umzobo T 10 ?