Question

please give me answer​

Answer 1

Answer:

6

Step-by-step explanation:

1+2+3+4+5+6 = 21

There is one ball of let say white colour, two of red, three of green, four of..., five of..., till six of any other colour.

Therefore total balls are 21

Answer 2

let the no. of ball be x

there are 21 balls of different colours

according to question ,

let no. of balls be x+1 , x+2 , x+3 , x+4 , x +5 , x +6

let , x + 1 + x+2 +x+3 +x+4 +x+5 + x+6 = 21

x = 6