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The MCQs below are drawn from the Mathematics subject category.
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7631
What is the average of the numbers 12, 15, 18, 21, and 24?
A. 16
B. 18
C. 20
D. 22
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Explanation
To find the average, sum all the numbers and divide by the total count. Sum = 12 + 15 + 18 + 21 + 24 = 90. Total count = 5. Average = 90 / 5 = 18. Since these are consecutive multiples of 3, the middle number (18) is the average.
7632
What approximate value should come in place of the question mark: 124.95% of 399.98 - sqrt(624.99) = ?
A. 425
B. 450
C. 475
D. 500
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Explanation
Approximate to 125% of 400 - sqrt(625). Evaluate: (1.25 * 400) - 25 = 500 - 25 = 475.
7633
Approximate the value of: 7.99^3 / 15.98 + 4.95.
A. 33
B. 35
C. 37
D. 39
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Explanation
Approximate to 8^3 / 16 + 5. Evaluate: 512 / 16 + 5 = 32 + 5 = 37.
7634
Find the approximate value: 14.95 * 11.98 - 29.99.
A. 130
B. 140
C. 150
D. 160
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Explanation
Approximate to 15 * 12 - 30. Evaluate: 180 - 30 = 150.
7635
What approximate value should come in place of x: 33.33% of 269.95 + 45.01 = x.
A. 115
B. 125
C. 135
D. 145
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Explanation
Approximate to 1/3 of 270 + 45. Evaluate: 90 + 45 = 135.
7636
Approximate: sqrt(255.95) / 3.99 * 5.05.
A. 15
B. 20
C. 25
D. 30
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Explanation
Approximate to sqrt(256) / 4 * 5. Evaluate: 16 / 4 * 5 = 4 * 5 = 20.
7637
Find the approximate value: 499.98 / 24.95 + 15.01 * 3.99.
A. 60
B. 70
C. 80
D. 90
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Explanation
Approximate to 500 / 25 + 15 * 4. Follow BODMAS: 20 + 60 = 80.
7638
What approximate value should come in place of the question mark: 59.98% of 250.05 - 24.99% of 119.98 = ?
A. 100
B. 110
C. 120
D. 130
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Explanation
Approximate to 60% of 250 - 25% of 120. Percentages: 150 - 30 = 120.
7639
Approximate the value of: sqrt(1023.95) * 5.01 + 10.05.
A. 150
B. 160
C. 170
D. 180
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Explanation
Approximate to sqrt(1024) * 5 + 10. Square root of 1024 is 32. Evaluate: 32 * 5 + 10 = 160 + 10 = 170.
7640
Find the approximate value: 12.01^2 - 14.99 * 4.01.
A. 74
B. 84
C. 94
D. 104
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Explanation
Approximate to 12^2 - 15 * 4. Evaluate: 144 - 60 = 84.
