Question

who many colours in rainbow​

Answer 1

Answer:

7 colours

${\huge{\fcolorbox{blue}{black}{\orange{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed {\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\underbrace{\overbrace{\mathcal{\blue{\fcolorbox{red}{black}{hope it will help you }}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}$

Answer 2

Explanation:

7 colors

red, orange, yellow, green, blue, indigo, violet.