Editorial Board and Pratiyogita Darpan Solutions for Chapter: Practice Set, Exercise 20: PRACTICE SET-20

The average of the two numbers is $62$. If two is added to the smallest number, the ratio between the numbers becomes $1:2$. The difference of the numbers is _____.

Find the largest natural number which exactly divides the product of any $4$ consecutive natural numbers _____.

If $\mathrm{DELHI}$ is coded as $73541$ and $\mathrm{CALCUTTA}$ is coded as $82589662$, how can $\mathrm{CALICUT}$ be coded?

What is the difference between IST and GMT?

Which one the following states has the longest coastline?

Two person can complete a piece of work in $9$ days. How many more persons are needed to complete double the work in $12$ days?

Two pipes $\mathrm{A}$ and $\mathrm{B}$ can fill a tank in $15$ minutes and $20$ minutes respectively. Both the pipes are opened together. But, after $4$ minutes, pipe $\mathrm{A}$ is turned off. What is the total time required to fill the tank?

If the letter positions corresponding to multiples of $5$ in the English alphabet are replaced by symbols and that of $7$ digits, how many letters will be left?