Four children made the following statements.
Henry : The average of Chloe's mass and my mass is 34 kg.
Wyatt : I am the heaviest.
Chloe : Grace is 2 kg lighter than Wyatt.
Grace : Our masses are in consecutive order.

What is the total mass of Henry, Wyatt and Chloe ?
Order of the mass of 4 children:
_____ , Grace, _____ , Wyatt (Heaviest)

Total mass of Henry and Chloe 
= 2 x 34
= 68 kg

For Henry and Chloe,
Mass of the lighter one = 1 u
Mass of the heavier one = 1 u + 2

Total mass of Henry and Chloe
= 1 u + 1 u + 2
= 2 u + 2

2 u + 2 = 68 
2 u = 68 - 2
2 u = 66

1 u = 66 ÷ 2 = 33

The mass of the four children in consecutive order is 33, 34, 35 and 36.

Total mass of Henry, Wyatt and Chloe
= 33 + 35 + 36
= 104

Answer(s): 104 kg