Which arrangement allows the maximum number of children to say '2'?

Taller children at the ends

Taller children in the middle

All children the same height

Lowest heights in the middle

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Q1.

What does the number '1' indicate about a child in line?

Q2.

If a child at the end of a line says '0', what does that mean?

Q3.

Is it possible for all five children to say '0' when arranged?

Q4.

What sequence indicates that the tallest child is in the middle of a line of five?