Question

please explain it in detail

Answer 1

Answer is 4 as only 1,2,3,4 are the numbers whose cubes dont go outside 100 so answer is 4

Answer 2

the right option is {d} 4

explanation:- 

for 1-  1×1×1=1
     2-   2×2×2=8
     3-   3×3×3=27
     4-   4×4×4=64

if you again precedes,
then for  5-  5×5×5=125

hence 125 is grater than 100 . so

so total no .of perfect cubes between 1 to 100 is 4  { 1,8,27,64}