Four children made the following statements.
Harper : The average of Gabriel's mass and my mass is 32 kg.
Caleb : I am the heaviest.
Gabriel : Andrew is 2 kg lighter than Caleb.
Andrew : Our masses are in consecutive order.

What is the total mass of Harper, Caleb and Gabriel ?
Order of the mass of 4 children:
_____ , Andrew, _____ , Caleb (Heaviest)

Total mass of Harper and Gabriel 
= 2 x 32
= 64 kg

For Harper and Gabriel,
Mass of the lighter one = 1 u
Mass of the heavier one = 1 u + 2

Total mass of Harper and Gabriel
= 1 u + 1 u + 2
= 2 u + 2

2 u + 2 = 64 
2 u = 64 - 2
2 u = 62

1 u = 62 ÷ 2 = 31

The mass of the four children in consecutive order is 31, 32, 33 and 34.

Total mass of Harper, Caleb and Gabriel
= 31 + 33 + 34
= 98

Answer(s): 98 kg