Question

there are 1000 students in a school. Each students wants to plant a tree to raise global awareness against deforestation. They want to plant a tree in such a way that the no. of rows and the no. of rows and the no. of columns remain same. Find the minimum no. of extra plants required for such an arrangement which value is shown by these students. With full process chapter name square and square roots.

Answer 1

find the nearest perfect square and subtarct it from hundred
find the closest perfect square(900) you know and find its square root(30) then proceed to next number (31) and square it 
1000-961=39
Step-1: Find the surplus or deficit from the base 10, 100, 1000 & so onStep-2: Add the surplus (if it is more than base) with or subtract the deficit (if it is less than base) from the whole number given and put the result.Step-3: Find the square of surplus or deficit and write the result in the last places. Be sure that, since 10 has 1 zero so, 1 more digit to go for numbers near 10, since 100 has 2 zeros so, 2 more digits to go for numbers near 100, accordingly since 1000 has 3 zeros, 3 more digits to go for numbers near 1000 and so on. So, carry forward or put extra zero(s) if necessary to place the digits accurate.

Answer 2

24 plants should be extra