How many chocolates are in the 2nd jar ?

12

Step-by-step explanation:

Let x be the number of chocolates in the first jar, then

x ← number of chocolates in second jar and

x + 90 ← number of chocolates in the third jar

The second jar also contains one half the chocolates in the third jar, thus

Equating chocolates in second jar

x = (x + 90) = x + 45

Multiply both sides by 10 to clear the fractions

8x = 5x + 450 ( subtract 5x from both sides )

3x = 450 ( divide both sides by 3 )

x = 150

and × 150 = 120

Number of chocolates in second jar = 120

the one on the bottom left

step-by-step explanation:

all of the other ones have a specific pattern

step-by-step explanation:

it will be a cylinder. with a diameter of 8 and 4 single pieces high