Practice NAT Mathematics questions with answers and explanations.
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There are 12 ratio parts, so one part is 30.
Rural respondents are 5 × 30 = 150.
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Profit is Rs. 0.6 million.
As a percentage of revenue, 0.6/2.4 × 100 = 25%.
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The extreme value 48 pulls the mean upward.
The median is resistant to the outlier and better represents the center.
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The weighted total is 1×2 + 2×3 + 3×5 = 23.
There are 10 observations, so the mean is 2.3.
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Pie-chart size is proportional to sector angle.
The largest angle, 108°, represents the largest part.
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The six-month total is 6 × 80 = 480 mm.
The missing month is 480 - 370 = 110 mm.
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The total is 400 people.
Males represent 240/400 × 100 = 60%.
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The increase is 25 on a base of 125.
Thus, 25/125 × 100 = 20%.
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The two largest shares are 35% and 25%.
Their combined share is 60%.
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The digit sum of 568 is 19, which leaves remainder 1 when divided by 9.
Adding 8 makes the digit sum 27, divisible by 9.
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Total expenses are Rs. 100,000.
Salaries are Rs. 50,000, which is 50% of the total.
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The largest two-digit multiple of 7 is 7 × 14.
This equals 98.
