Four children made the following statements.
Rael : The average of Caleb's mass and my mass is 49 kg.
Claire : I am the heaviest.
Caleb : Jackson is 2 kg lighter than Claire.
Jackson : Our masses are in consecutive order.

What is the total mass of Rael, Claire and Caleb ?
Order of the mass of 4 children:
_____ , Jackson, _____ , Claire (Heaviest)

Total mass of Rael and Caleb 
= 2 x 49
= 98 kg

For Rael and Caleb,
Mass of the lighter one = 1 u
Mass of the heavier one = 1 u + 2

Total mass of Rael and Caleb
= 1 u + 1 u + 2
= 2 u + 2

2 u + 2 = 98 
2 u = 98 - 2
2 u = 96

1 u = 96 ÷ 2 = 48

The mass of the four children in consecutive order is 48, 49, 50 and 51.

Total mass of Rael, Claire and Caleb
= 48 + 50 + 51
= 149

Answer(s): 149 kg