For the following questions answer them individually
P can do $$^{1}/_{2}$$ of a work in 10 days and Q can do $$^{1}/_{5}$$ of the same work in 4 days. In how many days can both finish the work, working together?
If the cost of 10 books is ₹250, then find the cost of 15 books.
A cube has sides that are 4 cm each, and the dimensions of a cuboid are $$2 cm{\times}3 cm{\times}4 cm$$. Find the positive difference between the volume of the cube and that of the cuboid .
Arun bought an old computer and spent ₹110 on its repairs. He then sold it to Bhola at a profit of 20%. Bhola sold it to Chandan at a loss of 10%. Chandan finally sold it for ₹1,188 at a profit of 10%. How much did Arun buy the computer for?
A goat is tied with a 10.5 m-long rope to one corner of a plot which is in the shape of an equilateral triangle each side of which is 16 m long. Find the area that the goat can graze on.
The ratio of the number of hens to the number of goats on farm A is 5: 4 and that on farm B is 5 : 7. What could be the ratio of the total number of hens to the total number of goats in farms A and B taken together?
Simplify the following expression.
$$25 - (4 \div 2) + 11.5 + 9.5$$
The following bar graph shows the number of students who like four different colours.
Find the difference between the number of students who like yellow and those who liked blue .
If A = 1300 and B = 1450, then B is approximately what percentage more than A?
Find the LCM of the fractions $$\frac{2}{5}, \frac{3}{7}$$,and $$\frac{4}{9}$$