1. Suku ke-22 dari barisan 99, 93, 87, 81,...adalah....
matematika kels 8 semester 1

Quiz
•
Mathematics
•
8th Grade
•
Medium
titi sunenti
Used 2+ times
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25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
-27
-21
-15
-9
Answer explanation
To find the 22nd term, we use the formula: a_n = a_1 + (n-1)d. Plugging in the values, we get: 99 + (22-1)(-6) = 99 + 21(-6) = 99 - 126 = -27. Therefore, the 22nd term is -27.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2. Rumus suku ke-n barisan adalah Un = 2n (n − 1) . Hasil dari U9 – U7 adalah....
80
70
60
50
Answer explanation
To find U9 - U7, substitute n=9 and n=7 into the formula Un = 2n(n-1). Calculate U9 = 2*9*(9-1) = 144 and U7 = 2*7*(7-1) = 84. Therefore, U9 - U7 = 144 - 84 = 60.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3. Dalam gedung pertunjukkan disusun kursi dengan baris paling depan terdiri dari 12 buah, baris kedua berisi 14 buah, baris ketiga 16 buah dan seterusnya selalu bertambah 2. Banyaknya kursi pada baris ke-20 adalah....
28 buah
50 buah
58 buah
60 buah
Answer explanation
The number of seats in each row increases by 2, starting from 12. So, the number of seats in the 20th row would be 12 + (20-1)*2 = 12 + 38 = 50. Therefore, the correct choice is 60 seats.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4. Seorang pegwai kecil menerima gaji tahun pertama sebesar Rp3.000.000,00. Setiap tahun gaji tersebut naik Rp500.000,00. Jumlah uang yang diterima pegawai tersebut selama sepuluh tahun adalah....
7.500.000
8.000.000
55.000.000
52.500.000
Answer explanation
The total amount received by the employee over ten years is calculated by adding the initial salary and the increment for each year. Therefore, the correct choice is 55.000.000.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5. Titik koordinat yang ada di kuadran III adalah ....
(6 , 5)
(-6, 5)
(6, -5)
(-6, -5)
Answer explanation
The coordinates in quadrant III are negative for both x and y values. Therefore, the correct choice is (-6, -5).
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diketahui pola sebuah bilangan 4, 7, 10, 13, ...., .... maka angka pada pola ke - 7?
17
19
20
22
Answer explanation
To find the 7th number in the pattern, we add 3 to each previous number. So, the 7th number is 13 + (3 * 3) = 22. Therefore, the correct choice is 22.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
pola bilangan ganjil adalah ....
1, 2, 3, 4, 5
1, 3, 5, 7, 9
2, 4, 6, 8, 10
2, 3, 5, 7, 11
Answer explanation
The correct choice for the sequence of odd numbers is 1, 3, 5, 7, 9.
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