Four children made the following statements.
Audrey : The average of Layla's mass and my mass is 36 kg.
Avery : I am the heaviest.
Layla : Zoey is 2 kg lighter than Avery.
Zoey : Our masses are in consecutive order.

What is the total mass of Audrey, Avery and Layla ?
Order of the mass of 4 children:
_____ , Zoey, _____ , Avery (Heaviest)

Total mass of Audrey and Layla 
= 2 x 36
= 72 kg

For Audrey and Layla,
Mass of the lighter one = 1 u
Mass of the heavier one = 1 u + 2

Total mass of Audrey and Layla
= 1 u + 1 u + 2
= 2 u + 2

2 u + 2 = 72 
2 u = 72 - 2
2 u = 70

1 u = 70 ÷ 2 = 35

The mass of the four children in consecutive order is 35, 36, 37 and 38.

Total mass of Audrey, Avery and Layla
= 35 + 37 + 38
= 110

Answer(s): 110 kg