1.
Suatu kalimat yang memuat variabel, nilai kebenarannya belum dapat ditentukan, apakah bernilai salah atau benar, disebut...
Correct Answer
A. Kalimat terbuka
Explanation
An open sentence is a sentence that contains variables, and its truth value cannot be determined until the values of the variables are specified. It is called an open sentence because it is "open" or incomplete without the specific values of the variables. Therefore, the correct answer is "Kalimat terbuka".
2.
Suatu kalimat uang dapat ditentukan nilai kebenarannya, yaitu benar atau salah, tetapi tidak dapat terjadi benar dan salah bersamaan, disebut....
Correct Answer
C. Pernyataan
Explanation
The given correct answer is "Pernyataan". This is because a "pernyataan" refers to a statement or proposition that can be evaluated as either true or false. It is a declarative sentence that can be determined for its truth value. In contrast, the other options such as "kalimat terbuka" (open sentence) and "kalimat tertutup" (closed sentence) do not specifically refer to statements that can be evaluated for truth or falsehood. "Bukan pernyataan" means "not a statement" and "kalimat benar atau salah" means "sentence is true or false", but they do not capture the concept of a statement being either true or false.
3.
Di bawah ini yang merupakan pernyataan adalah...
Correct Answer
C. Satu minggu terdiri dari 6 hari
Explanation
The given statement "Satu minggu terdiri dari 6 hari" is correct. It means that a week consists of 6 days.
4.
Ingkaran dari " saya hadir dan Anda pergi" adalah.....
Correct Answer
E. Saya tak hadir atau Anda tak pergi
Explanation
The correct answer suggests that the negation of the statement "saya hadir dan Anda pergi" is "Saya tak hadir atau Anda tak pergi." This means that either I am not present or you are not leaving.
5.
Ingkaran pernyataan " Semua papan tulis berwarna hitam" adalah...
Correct Answer
E. Beberapa papan tulis tidak berwarna hitam
Explanation
The correct answer is "Beberapa papan tulis tidak berwarna hitam" because it is the only statement that acknowledges the possibility of some whiteboards not being black. The other statements either deny the possibility of any black whiteboards or imply that all whiteboards are not black.
6.
Kontraposisi pernyataan: Jika Anda rajin belajar maka Anda menjadi pandai" adalah.....
Correct Answer
C. Jika Anda tidak menjadi pandai maka Anda tidak rajin belajar
Explanation
The given answer is the contrapositive of the statement "Jika Anda rajin belajar maka Anda menjadi pandai" (If you study hard, then you become smart). The contrapositive of a conditional statement switches the hypothesis and conclusion and negates both. So, the answer states that if you do not become smart, then you are not diligent in studying.
7.
Pernyataan : " Jika Rina lulus ujian maka Rina akan menikah" ekuivalen dengan......
Correct Answer
E. Jika Rina tidak menikah maka Rina tidak lulus ujian.
Explanation
The given correct answer is "Jika Rina tidak menikah maka Rina tidak lulus ujian." This is the contrapositive of the original statement. In logic, the contrapositive of a conditional statement switches the hypothesis and conclusion and negates both. So, if we negate the original statement "Jika Rina lulus ujian maka Rina akan menikah," we get "Jika Rina tidak menikah maka Rina tidak lulus ujian." This means that if Rina does not get married, then she will not pass the exam.
8.
Konvers dari pernyataan " Jika malam minggu Adi tidak belajar: adalah..
Correct Answer
A. Jika Adi tidak belajar maka malam minggu
Explanation
The correct answer is a logical deduction based on the given statements. It can be inferred from the statements that if Adi does not study, then it is the weekend. This is because the first statement states that if Adi does not study, then it is the weekend. Therefore, the correct answer is "Jika Adi tidak belajar maka malam minggu" which means "If Adi does not study, then it is the weekend."
9.
Negasi dari pernyataan “ Ani senang bernyanyi dan tidak senang olah raga”, adalah....
Correct Answer
D. Ani tidak senang bernyanyi atau senang olah raga
Explanation
The correct answer is "Ani tidak senang bernyanyi atau senang olah raga" because it represents the negation of the statement "Ani senang bernyanyi dan tidak senang olah raga." The original statement states that Ani is happy singing and not happy doing sports. The negation of this statement would be that Ani is not happy singing or is happy doing sports.
10.
Diketahui premis – premis seperti di bawah ini :Premis 1 : Jika ada kerusakan mesin maka mobil tidak dapat bergerakPremis 2 : Mobil dapat bergerakKesimpulan yang sah dari kedua premis di atas adalah ....
Correct Answer
C. Tidak ada kerusakan mesin
Explanation
The conclusion that can be drawn from the given premises is that there is no damage to the engine. This can be inferred because the first premise states that if there is damage to the engine, the car cannot move. However, the second premise states that the car is able to move. Therefore, it can be concluded that there is no damage to the engine.
11.
“ Jika Ardi dapat mengerjakan soal try out ini dengan benar maka dia siap menghadapi ujian nasional”. Pernyataan yang ekuivalen dengan pernyataan di atas adalah ….
Correct Answer
B. Jika Ardi tidak siap menghadapi ujian nasional maka dia tidak dapat mengerjakan soal try out ini dengan benar.
Explanation
The correct answer states that if Ardi is not prepared for the national exam, then he will not be able to solve the tryout questions correctly. This is equivalent to the given statement, as it maintains the same logical relationship between being prepared for the national exam and solving the tryout questions correctly.
12.
Dari premis-premis berikut :Premis 1 : Jika dia siswa SMA, maka dia berseragam putih abu-abuPremis 2 : Andi berseragam bukan putih abu-abuKesimpulan yang sah adalah ....
Correct Answer
E. Andi bukan siswa SMA
Explanation
Based on the given premises, it is stated that if someone is a high school student, then they wear a gray and white uniform. It is also stated that Andi does not wear a gray and white uniform. Therefore, it can be concluded that Andi is not a high school student.
13.
Ingkaran pernyataan " semua bangun datar kongrueng memiliki luas yang sama" adalah.....
Correct Answer
E. Beberapa bangun datar kongruen luasnya tidak sama
Explanation
The correct answer suggests that there are some congruent plane figures that do not have the same area. This means that even if two figures have the same shape and size, their areas can still be different.
14.
Diketahui premis – premis berikut :Premis 1 : Jika harta benda Andi terbawa banjir, maka ia menderita.Premis 2 : Andi tidak menderita.Kesimpulan yang sah dari premis – premis tersebut adalah ....
Correct Answer
E. Harta benda Andi tidak terbawa banjir.
Explanation
The conclusion that can be drawn from the given premises is "Harta benda Andi tidak terbawa banjir" (Andi's belongings were not carried away by the flood). This conclusion is valid because the first premise states that if Andi's belongings are carried away by the flood, then he will suffer. However, the second premise states that Andi did not suffer. Therefore, it can be concluded that Andi's belongings were not carried away by the flood.
15.
Diketahui premis-premis sebagai berikut:Premis 1 : Jika semua orang waspada banjir atau tanah longsor, maka musim hujan tibaPremis 2 : Musim hujan belum tibaKesimpulan yang sah dari premis-premis tersebut adalah.....
Correct Answer
D. Ada orang tidak waspada banjir dan tanah longsor
Explanation
The conclusion that can be drawn from the given premises is that there are people who are not cautious about floods and landslides. This can be inferred from the fact that the first premise states that if everyone is cautious about floods and landslides, then the rainy season has arrived. Since the second premise states that the rainy season has not yet arrived, it implies that not everyone is cautious about floods and landslides. Therefore, the correct answer is "Ada orang tidak waspada banjir dan tanah longsor."