
Baisan Aritmatika
Authored by totok yuniadi
Mathematics
9th Grade
Used 5+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Gambar berikut adalah pola segitiga yang disusun dari batang korek api.
Banyak batang korek api yang diperlukan untuk membuat pola ke-7 adalah ....
30
45
84
108
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Rumus suku ke-n dari barisan bilangan 1, 3, 9, 27, ... adalah ....
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Rumus suku ke-n dari barisan bilangan 3, 6, 12, 24, ... adalah ....
Un = 2n – 1
Un = 2 . 3n – 1
Un = 3 . 2n – 1
Un = 6n – 1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diketahui barisan bilangan 32, 16, 8, 4, ... Rumus suku ke-n adalah ....
26 + n
25 + n
26 – n
25 – n
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui suatu barisan aritmetika dengan U7 = 27 dan U11 = 42. Maka nilai U9 adalah ....
36
35
34
32
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Dalam sebuah ruangan terdapat 15 baris kursi. Banyaknya kursi pada baris pertama 30 buah, dan pada setiap baris berikutnya terdapat 3 kursi lebih banyak dari baris di depannya. Banyak kursi pada baris kedelapan adalah ....
57
54
51
48
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Dalam suatu ruangan terdapat 11 kursi pada barisan pertama, dan setiap baris berikutnya memuat dua kursi lebih banyak dari barisan di depannya. Jika terdapat 8 baris kursi dalam ruangan, maka banyak kursi seluruhnya dalam ruangan adalah ....
144 kursi
136 kursi
132 kursi
120 kursi
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