The total age of the people in Kaydence's family is 200. If Kaydence's father is 60 years old, Kaydence's mother 2 years younger than Kaydence's father, Kaydence's brother 1/2 the age of Kaydence's father, and Kaydence's sister 40 years old, how old is Kaydence?
If Kaydence's father is 60 years old, her mother is 60-2 = 
<gadget id="calculator">60-2</gadget>
<output>58</output>
58 years old.
The total age of the mother and father is 60+58 = 
<gadget id="calculator">60+58</gadget>
<output>118</output>
118 years.
Kaydence's brother is half the father's age, which is 1/2*60 =
<gadget id="calculator">1/2*60</gadget>
<output>30</output>
30 years.
The total age of Kaydence's father, mother, and brother is 30+118= 
<gadget id="calculator">30+118</gadget>
<output>148</output>
148 years.
If you add Kaydence's sister's age to the total age of the father, mother, and brother, you get 148+40 = 
<gadget id="calculator">148+40</gadget>
<output>188</output>
188 years.
If everyone's age in the family is 200, then Kaydence's age is 200-188 = 
<gadget id="calculator">200-188</gadget>
<output>12</output>
12 years old.

<result>12</result>