Question

Non square no.s lying between 20² and 21²=

Answer 1

Answer:

40 no.

Step-by-step explanation:

no. lying between n² and (n+1)² is

n*2

so, no. lying between 20² and 21² will be

20*2=40

Answer 2

Answer:

41 numbers are lying between 20^2 and 21^2