Question

13824by observation methed find cube root

Answer 1

After resolving the prime factors, we get 

13824 = 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 

Grouping 

= 2×2×2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3

Taking one factor from each group

∛13824 = 2 x 2 x 2 x 3 

∛13824 = 24

Answer 2

first group 824 and take 4 in first group than take second group 13 is a small than 3cube than take 2cube the answer is 24