For the following questions answer them individually
If the 9-digit number 72 $$x$$ 843 1 y 4 is divisible by 36, what is the value of $$\left(\frac{x}{y}-\frac{y}{x}\right)$$
In the given figure, the circle with centre O has radius IO cm. The radius of the circle with centre P is x . STR is a common tangent to the two circles at points R and S as shown in the figure. RT= 16 cm and TS = 24 cm. What is the value of x (in cm)?
Two trains A and B start running at 80km/h and 82 km/h towards each other from two different stations. They meet after 1 hour and 30 minutes. How far were they from each other when they started?
Study the given table and answer the question that follows.
Find the number of students who opted Biology in School D.
What is the total surface area of a solid right circular cylinder of radius 7 cm and height 8 cm? ($$ \pi = \frac{22}{7}$$)
Simplify the following expression.
$$72 − 42 \div 6 of 7 \times 4 of 3 \div 4 \times 3 − 5$$
A and B can complete a work in 10 days and 15 days, respectively. They got a total of Rs. 1,250 for that work. What will be B’s share?