Question

-1O+(-13) -(-21) = -50+42-(-23)​

Answer 1

The rule is : Divide the number by 2 and write the result in the reverse order

4×8=482=24⇒424×8=482=24⇒42 etc

∴2×4=242=12⇒21

Answer 2

Answer:

Correct option is

A

3

x

m

We know mvr=nh/2π

so 2πr/n=h/mv

λ=h/mv

2πr=x m

and n=3

substituting the value and we get

λ=x/3 m