IKMC 2010 — Grades 3–4 Question 20

Question 20

Kamilla wrote down all of the numbers from 1 to 100 one after another in a table with 5 columns. A part of the table is shown. Her brother cut out a piece of the table and erased some of the numbers. Which of the following could be this piece?

| Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
| --- | --- | --- | --- | --- |
| 1 | 2 | 3 | 4 | 5 |
| 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 |

Original table illustration:

1. | Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
   | --- | --- | --- | --- | --- |
   | | 43 | | | |
   | | | 48 | | |
   
   
2. | Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
   | --- | --- | --- | --- | --- |
   | | | 58 | | |
   | | 52 | | | |
   
   
3. | Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
   | --- | --- | --- | --- | --- |
   | | | | 69 | |
   | | 72 | | | |
   
   
4. | Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
   | --- | --- | --- | --- | --- |
   | | 81 | | | |
   | | 86 | | | |
   
   
5. | Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
   | --- | --- | --- | --- | --- |
   | | 90 | | | |
   | | | | 94 | |