matematika kels 8 semester 1

matematika kels 8 semester 1

8th Grade

25 Qs

quiz-placeholder

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matematika kels 8 semester 1

matematika kels 8 semester 1

Assessment

Quiz

Mathematics

8th Grade

Medium

Created by

titi sunenti

Used 2+ times

FREE Resource

25 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1.      Suku ke-22 dari barisan 99, 93, 87, 81,...adalah....

-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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