Practice Pakistan questions with answers and explanations.
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A composite number has more than two positive factors.
The number 4 has factors 1, 2, and 4.
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Precision describes repeatability.
Measurements can be precise without being accurate.
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The positive factors of 16 are 1, 2, 4, 8, and 16.
Therefore, it has 5 positive factors.
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Accuracy describes agreement with the true or accepted value.
Systematic error can reduce accuracy.
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Systematic errors often arise from calibration or method bias.
Repeated measurements do not automatically remove them.
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Random errors cause scatter around a central value.
Repeated measurements and averaging can reduce their effect.
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Leading zeros are not significant, but trailing zeros after a decimal are.
Thus 4, 5, and the final zero are significant.
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The digit 7 is in the thousands place.
Therefore, its place value is 7 × 1,000 = 7,000.
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A prime number has exactly two positive factors: 1 and itself.
The number 29 is not divisible by 2, 3, or 5.
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The common factors of 36 and 48 include 1, 2, 3, 4, 6, and 12.
The greatest of these is 12.
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Multiples of 8 are 8, 16, 24, and so on.
The first multiple also divisible by 12 is 24.
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A number is divisible by 9 when the sum of its digits is divisible by 9.
For 5,832, the digit sum is 18.
