MATH
1 + 1
2
Where We Live
Earth
63 + 7 = ?
? = 70
The Largest Planet
Jupiter
163 + 107 = x
x = 270
Dwarf Planet
Pluto
43 + x = 50
x = 7
The Coldest Planet
Neptune
1,234 + x = 1,440
x = 206
The Internal Defense Of The Human Body
The Human Immune System