1) In a quiz, positive marks are given for correct answers and negative marks are given for incorrect answers. If Jack’s scores in five successive rounds were 25, – 5, – 10, 15 and 10, what was his total at the end? a) 20 b) 25 c) 30 d) 35 2) In New York City temperature was – 5°C on Wednesday and then it dropped by 2°C on Thursday. What was the temperature of New York City on Thursday? On Friday, it rose by 4°C. What was the temperature on this day? a) –7° C; –3° C b) -5° C; –1° C c) 7° C; 3° C d) 5C°; 1° C 3) In a class test containing 15 questions, 4 marks are given for every correct answer and (–2) marks are given for every incorrect answer. Daniel attempts all questions but only 9 of her answers are correct. What is her total score? a) 24 b) -24 c) 36 d) 56 4) For any integer a, what is (–1) × a equal to? a) a b) 0 c) -a d) 1 5) A certain freezing process requires that room temperature be lowered from 40°C at the rate of 5°C every hour. What will be the room temperature 10 hours after the process begins? a) 10°C b) 0 °C c) 20°C d) – 10°C

Mathematics 7

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