Dreamtech Expert Team Solutions for Exercise 1: Practice Questions

Which of the following digits cannot be in the place of units digit when a number is squared?

A father received Rs. $5900$ from his son. He lost Rs. $1000$ out of it, but his son sent him Rs. $2000$ more. He then paid his due medical bills of Rs. $6000$. The money left with the father is:

If the weight of a $2\frac{1}{7}$metres pipe is $17\frac{1}{17}$kg, what will be the weight of $1$metre pipe?

Seven farmers harvest crops in a field in $12$ hours. How many hours will be required to do the same work in $14$ hours?

The product of two numbers is $245457$. If one of the numbers is $9091$, the other is?

The traffic lights at four different road crossings change after every $24$ sec,$48$ sec, $1$ min and $1$ min $12$ seconds respectively. If they all change simultaneously at $9:10$ PM, at what time will again change simultaneously?

The traffic lights at five different road crossings change after every $12$ sec, $24$ sec, $1$ min, $90$ sec, and $2$ min respectively. If they all change simultaneously at $12:00$ PM, at what time will they again change simultaneously?

Find the largest five-digit number exactly divisible by $36, 60$ and $80$.