Posted by:
deepshikhasingh15
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Time ended
G7 Integers
Math quiz helps us to enhance brains neural network.
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1) Find the value of:
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2) Which among the options is equal to 2?
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3) The sum of three consecutive negative integers is –24.What is the greatest of the three integers?
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4) A cage held 7 parrots with an average price of ₹8000. Two parrots flew away; the average price of the remaining 5 is now ₹7500. If one escaped parrot was worth ₹10 000, what was the price of the other?
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5) What is the unit digit of (−7)^99?
Powers of 7: 7, 49, 343, 2401, … ⇒ unit digits repeat in cycle: 7, 9, 3, 1 99 mod 4 = 3 ⇒ 3rd in cycle ⇒ unit digit = 3
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6) How many integer solutions does the inequality |x + 7| < 12 have?
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7) What is the sum of all odd negative integers between −20 and 0?
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8) Simplify:
(−6) × (−8) + (−45) ÷ 9 − (−2)³
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9) Three consecutive integers have a sum of –36.Find the integers.
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10) What integer is exactly halfway between −73 and 19?
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11) At Frostvale, the temperature was –10 °C on Monday. It rose by 8.5 °C on Tuesday, dipped by 2.25 °C on Wednesday, then rose by 1.75 °C on Thursday. What were the temperatures on Wednesday and Thursday, respectively?
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12) Evaluate:
[−48 ÷ (−6)] + [7 − 3(5 − 9)] − [−36 ÷ 9]
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13) If
(−3x + 14) − (5x − 6) = −40
find x.
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14) Find the units digit of (−2)^99.
Pattern of units digit of powers of 2: 2, 4, 8, 6 (cycle of 4) So for 99 ⇒ 99 mod 4 = 3 ⇒ third number in cycle = 8 Because negative odd power ⇒ result is negative ⇒ −8 ⇒ units digit = 8
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15) Sara owns a coffee shop. On Wednesday she made a loss of ₹11 and on Thursday a loss of ₹15. On Friday she made a profit of ₹13 and on Saturday a profit of ₹14. Write an addition equation for the described situation.
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16) A cage originally held 10 parrots at an average price of ₹6000. One parrot flies away; the new average of the 9 survivors is ₹5900. Then a second escapes, and the average of the remaining 8 is ₹5800. What was the price of the second escaped parrot?
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17) Solve for integer x: |3x − 4| ≤ 11
−11 ≤ 3x − 4 ≤ 11 ⇒ Add 4: −7 ≤ 3x ≤ 15 ⇒ Divide: −7/3 ≤ x ≤ 5 x = −2, −1, 0, 1, 2, 3, 4, 5 ⇒ 8 integer values
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18) Which of the following expressions is divisible by 6 for every integer 𝑛?
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19) A hiker descends 300 meters into a valley, climbs up 450 meters to a hilltop, then descends 200 meters. What is the hiker’s final elevation relative to the starting point?
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20) On the number line, the distance between -13 and x is 25.
What are the possible values of x?
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