Family

Dad has two years more than mom. Mom has 5 times more than Katy. Katy has 2 times less than Jan. Jan is 10 years old. How old is everyone in the family? How old are all together?

Correct result:

J =  10
K =  5
M =  25
O =  27
s =  67

Solution:

$K=10\mathrm{/}2=5$

$M=5\cdot 5=25$

$O=2+25=27$

$s=27+25+5+10=67$

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