West Bengal Board Solutions for Chapter: Square Root, Exercise 10: Let's Work out - 18.2

Find which least square number has a factor $17$.

Find the least square number other than $0$ which is divisible by $10, 15, 20$ and $30$. Also write the next square number which will be divisible by these numbers.

Place the given numbers in the respective columns.

$20, 27, 50, 75, 100, 108, 144, 169, 180, 256$

This year on Netaji's birthday, the students present in physical education class were made to stand in rows of $18, 24, 27$ for march past. At one point of time we formed a solid square. Find the least number of students present in school on that day.

The product of two positive numbers is $147$. The greater number is $3$ times the smaller number. Find the two numbers.

Arrange the following in ascending order of their value.

$\left(\sqrt{36}+\sqrt{25}\right), \left(\sqrt{49}+\sqrt{9}\right), \left(\sqrt{25}+\sqrt{100}\right), \left(\sqrt{4}+\sqrt{16}\right)$

Out of the three positive numbers, the product of, first and second is $24;$ second and third is $48;$ and that of first and third is $32$. Find the three numbers.

On Republic Day, our Physical Education teacher made all students stand in rows having $12, 15$ and $20$ students, at different point of time for march past. At one point of time, the students were arranged in solid square. Find at least how many students were present in school on that day.