For the following questions answer them individually
A pen passing through two hands is finally sold at a profit of 44% of the original cost price. If the first dealer makes a profit of 20%, then the profit made by the second dealer is:
A sum of โน14,375, when invested at r% interest per year compounded annually, amounts to โน16,767 after two years. What is the value of r?
Under a discount scheme, a dozen pair of gloves quoted at โน200 is available at a discount of 20%. How many pairs of gloves can be bought for โน320?
Ravi drove for 4 hours at a speed of 70 miles per hour and for 2 hours at 40 miles per hour.
What was his average speed (in miles per hour) for the whole journey?
In ฮABC, if G is the centroid and AD is a median with length 9 cm, then the length of AG is:
A person could save 20% of his income. A year later, his income increased by 25% but he could save the same amount only as before. By what percentage has his expenditure increased?
If $$x + y + z = 10, x^{2} + y^{2} + z^{2} = 30$$, then the value of $$x^{3} + y^{3} + z^{3} - 3xyz$$ is _________.
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