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SIMON BARUCH MIDDLE SCHOOL 104 330 EAST 21ST STREET, NEW YORK, NY 10010 Ms Gaetani Principal TEL: 212-674-4545 / FAX: 212-477-2205 Mr. Daly Ms Goldstein Mr. Macri Assistant Principal Assistant Principal Assistant Principal GRADE 7 There is space provided for you to show your working for each question. Once you have the correct answer, bubble in the appropriate spot on the scan card. To gain full credit you MUST show working where appropriate. Name:_______________________________________ Class: ___________________ 1 Mr. McManus is researching four types of memory modules for his computer. The data are shown in the table below. Module W X Y Z Amount of Memory (in bytes) 3.64 x 108 1.28 x 109 2.56 x 109 5.12 x 108 Mr. McManus wants to buy the module with the most memory. Which module should he buy? A Module W B Module X C Module Y D Module Z 2 In the year 2000, approximately 169,000,000 personal computers were used in the United States. What is this number expressed in scientific notation? A 1.69 x 10-8 Grade 7 December 08 B 16.9 x 10-7 C 16.9 x 107 D 1.69 x 108 1 3 What is the greatest common factor of 42, 63 and 105? A 3 B 7 4 Simplify the expression A 6 C 14 D 21 C 14 D 16 4 + 23 - |-4| B 8 5 The average distance from Pluto to the Sun is 3.65 x 109 miles. What is this number written in standard form? A 365,000,000 B 3,650,000,000 C 36,500,000,000 D 365,000,000,000 6 Between what two whole numbers is √125? A 63 and 64 B 62 and 63 C 12 and 13 D 11 and 12 7 Ms Lopez has decided to become a painter. She charges $130 for paint supplies and $25 for each hour, h, she works. Which expression represents the total amount Ms Lopez charges? A (130 +25)h Grade 7 December 08 B 130 + 25h C 130h +25 D 103 + (25 + h) 2 8 What is the least common multiple of 9, 18and 21? A 3 B 81 C 126 D 3402 9 Phillip writes the expression 27. Which of the following is another way to write the same expression using repeated multiplication? A 2x7 B 7 x7 C 2x2x2x2x2x2x2 D 7x7x7x7x7x7x7 10 Emily earned $25 babysitting on Friday. On Saturday she babysat for 4 hours at a rate of $5 per hour. On Sunday she went to the store and spent $18 on a CD. How much money did Emily have left after buying the CD? A $7 B $12 C $23 D $27 11 The temperature on a winter night in Kansas is -6o Celsius. The temperature decreases by 8o Celsius. What is the new temperature, in degrees Celsius? A -2oC Grade 7 December 08 B 2oC C -14oC D 14oC 3 12 Cindy has four more then five times as many cousins as Kathy, k. Which expression represents how many cousins Cindy has compared with Kathy? A 4k + 5 B 5k – 4 C 5k + 4 D 5k(k + 4) 13 Stacy starts a savings account with $15. Each month she deposits $10 more into her account. Stacy now has saved $75. Which equation can be used to determine how many months, m, Stacy has deposited money into her saving account? A 10m x 15 = 75 B 15m x 10 = 75 C 10m + 15 = 75 D 15m + 10 = 75 14 The circumference of the circle below is 25.12 centimeters. Which is the best estimate for the length of the radius of the circle? A 3centimeters Grade 7 December 08 B 4centimeters C 8 centimeters D 16 centimeters 4 15 The expression below represents the total cost in dollars, including shipping, for a certain number of music CDs, m. 8m + 5 Based on the expression above, what is the total cost for 4 music CDs? A $13 B $17 C $32 D $37 16 The line graph below shows the growth of Terrell’s tomato plant for 10days. How tall was the tomato plant on day 7? A 3 centimeters B 12.5 centimeters C 17.5 centimeters D 20 centimeters 17 Which algebraic expression represents “six less than half a number”? 1 1 1 1 A x-6 B 6- x C (x – 6) D (6 - )x 2 2 2 2 Grade 7 December 08 5 18 What is the prime factorization of 144 written in exponential form? A 2242 B 2332 C 2342 D 2432 19 Ms Wilson went swimming each day of her vacation. On Monday she swam for 3 of an 4 1 1 hours, on Wednesday she swam for of an hour, on 4 2 3 1 Thursday she swam for 1 of an hour and on Friday she swam for of an hour. Which list 4 4 below shows the times in order from shortest to longest? hour, on Tuesday she swam for 2 1 3 3 1 1 A 2 ,1 , , , 4 4 4 2 4 B 3 1 1 3 1 , 2 , ,1 , 4 4 2 4 4 C 1 1 3 3 1 , , ,1 ,2 4 2 4 4 4 D 1 1 1 3 3 , ,2 , ,1 4 2 4 4 4 20 Extreme View Helicopter Tours flew 34 times on Friday. They flew the same number of times on Saturday as they did on Sunday. The total number of times they flew for the three days was 118. How many times did Extreme Helicopter Tours fly on Saturday? A 34 Grade 7 December 08 B 42 C 59 D 84 6 Answer Key Question 1 2 3 Answer 3 4 4 4 2 5 6 2 4 7 8 9 10 11 12 13 14 15 16 17 18 2 3 3 4 3 3 3 2 4 3 1 4 19 20 3 2 Grade 7 December 08 Standard N7 Compare numbers written in scientific notation N5 Write numbers in scientific notation N8 Find the common factors and greatest common factor of two or more numbers N11 Simplify expressions using order of operations. Note: Expressions may include absolute value and/or integral exponents greater than 0 N6 Translate numbers from scientific notation into standard form N18 Identify the two consecutive whole numbers between which the square root of a non-perfect square whole number less than 225 lies A1 Translate two-step verbal expressions into algebraic expressions N9 Determine multiples and least common multiple of two or more numbers N4 Develop the laws of exponents for multiplication and division N12 Add, subtract, multiply and divide integers N12 Add, subtract, multiply and divide integers A1 Translate two-step verbal expressions into algebraic expressions 6.A3 Translate two-step verbal sentences into algebraic equations G1 Calculate the radius or diameter, given the circumference or area of a circle 6.A2 Use substitution to evaluate algebraic expressions S6 Read and interpret data represented graphically A1 Translate two-step verbal expressions into algebraic expressions N10 Determine the prime factorization of a given number and write in exponential form 6N15 Order rational numbers (including positive and negative) N12 Add, subtract, multiply and divide integers 7