Q1.
Write down the number each child should say based on this rule for the arrangement shown below.
Answer
Reading the picture from the left, the order of the children from tallest to shortest is: red, green, blue, pink, dark-yellow, orange, pale-yellow.
Now count, for each child, how many taller children stand ahead:
| Child (from the left) | Taller children in front | Number called out |
|---|---|---|
| 1st — pale yellow (shortest) | none | 0 |
| 2nd — light blue | none (only the shortest is ahead) | 0 |
| 3rd — dark yellow | light blue | 1 |
| 4th — green | none | 0 |
| 5th — orange | light blue, dark yellow, green | 3 |
| 6th — red (tallest) | none | 0 |
| 7th — pink | light blue, green, red | 3 |
So the sequence is 0, 0, 1, 0, 3, 0, 3.
Check it yourself: the numbers 0 appear exactly where a child is taller than everyone ahead — the pale-yellow child (nobody ahead), the light-blue child, the green child and the red child.