Write down the number each child should say based on this rule for the arrangement shown below. The arrangement on page 128 — the speech bubbles are blank in the book.

Question

Write down the number each child should say based on this rule for the arrangement shown below. The arrangement on page 128 &mdash; the speech bubbles are blank in the book.

Accepted 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.

NCERT Solutions for Class 7th Maths Chapter 6 In-text Questions — Numbers Tell us Things