Logical and Interesting Math Problems - 7th Grade

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What is the value of x in the equation 3x + 5 = 20?
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x = 5
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If you have a sequence of numbers: 2, 4, 8, 16, what is the next number in the sequence?
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32
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A number is multiplied by 8 and then reduced by 4 to get 60. What is the number?
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The number is 8.
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What is the area of a rectangle with a length of 5 cm and a width of 3 cm?
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15 square centimeters
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How many sides does a hexagon have?
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Six sides
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If a car travels at 60 km/h, how far will it travel in 2.5 hours?
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150 kilometers
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What is the greatest common divisor (GCD) of 24 and 36?
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12
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Solve for y: 2y/5 = 8.
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y = 20
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What is the next prime number after 11?
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13
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What is the perimeter of a square with a side length of 4 cm?
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16 cm
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If two angles in a triangle are 35° and 65°, what is the third angle?
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80°
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What is the probability of rolling a 3 on a fair six-sided die?
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1/6
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Convert 3/4 to a percentage.
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75%
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Simplify the fraction 16/64.
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1/4
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How many degrees are in a right angle?
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90 degrees
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