
Help me to solve (b) and (c)
With Clear working
Help me to solve (b) and (c)
With Clear working
White buttons are square of the figure number, since total dots is 176 , try 10 or 11.
b) White button = 11 x 11 = 121
Black button = (11 x 10) / 2 = 110/2 = 55
121 + 55 = 176
Pattern number = 11
(c) sqrt ( 784) = 28
Black dots = (28 x 27) /2 = 378