Tham khảo tài liệu 'sat 6 full tests phần 10', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter 4 1. If X X 3 X 4 Y Y 3 Y 4 and Y 60 what is the value of X A B 16 C 20 D 45 E 60 The best answer is E. Replace Y with 60 and solve X X 3 X 4 60 60 3 60 4 60 20 15 95 multiply both sides by 12 to get 12X 4X 3X 95 x 12 1140 19X 1140 X 60. 2. The price of 15 books is 45. If the price of 8 tapes and 4 books is 44 what is the price of one tape A 3 B 4 C 5 D 6 E 7 The best answer is B. 15 books cost 45 and therefore one book costs 3. 8 tapes 4 3 44 8 tapes 32 The price of a tape is 4. 3. Tom is three times older than Shelly. If in three years Tom would be twice as old as Shelly how old is Shelly today A 3 B 4 C 6 D 9 E 12 The best answer is A. Let T be the age of tom today and S the age of Shelly. We can write the following equations T 3S and T 3 2 S 3 3S 3 2S 6 S 3 and so the correct answer is A. 4. How many double-digit numbers are there where the product of their digits is 8 A 1 B 2 C 3 D 4 E 5 The best answer is D. Since there aren t so many numbers write them all 18 24 42 and 81 and so the right answer is D. 5. How many odd double-digit numbers which the sum of their digits is 6 exist A 1 B 3 C 5 D 7 E 9 The best answer is B. Since there aren t many numbers write them all down 15 33 and 51 and so B is the right answer. 6. Inches Centimeters 7 X Using the following conversion table what is the value of X A 14 B 17 C 21 D 28 e 30 The best answer is C. Since x 3 X 7 x 3 using the same ratio. C is the correct answer. 7. The product of two odd integers is between 304 and 337 exclusive. Which of the following cannot be one of the integers A 5 _ B 13 C 35 d 39 E 43 The best answer is E. If the number is too big for example 43 multiplying it with another odd integer wouldn t be in the specified range. 43 x 7 301 which is under the range. 43 x 9 387 which is over the range and therefore 43 cannot be one of the integers. 8. If the average of 6 consecutive numbers is X what is the average of the two median numbers A X 2 B X 3 c X - 1 D X E
