1= 15
2= 12
Hope this helps
1 x 10-3 make sure the -3 is above the 10.
= 2025
When you are told to find the smallest length possible, you perform L.C.M(Least common multiples)
For this, you divide the given lengths using the numbers that divides all through.
I have added an image to this answer. Go through it for more explanation
5(3)-(-3)
15- (-3)
15+3 = 18
2x+2 < x+3
2x-x < 3-2
x <1