3. At Red Star Primary School's Go (Weiqi) interest group, there are 4 children and 2 coaches. The 4 children are 2 years apart in age, and the 2 coaches are also 2 years apart in age. The sum of the squares of the ages of the 6 people is 2796 years, and the sum of the ages of the 6 people is $\qquad$ years.
【Answer】106
【Solution】Let the ages of the four children be $a, a+2, a+4, a+6$, and the ages of the two-digit aged individuals be $b, b+2$: From the problem, we have
$$
\begin{aligned}
a^{2}+(a+2)^{2}+(a+4)^{2}+(a+6)^{2}+b^{2}+(b+2)^{2} & =2796 \\
4 a^{2}+24 a+60+2 b^{2}+4 b & =2796 \\
2(a+3)^{2}+(b+1)^{2} & =1387
\end{aligned}
$$

By enumeration, we get $b+1=35, a+3=9$, so the sum of the six individuals is $35 \times 2+9 \times 4=106$