Level 2
1 + 2 + 3 + ... + 94 + 95 + 96 + 97. When the first 97 whole numbers are added up. What is the digit in the ones place of this total?
2 m
Level 3
There are 5 tennis players. Each player will have one match against each of the other 4 players. How many different matches are there to be arranged?
2 m
Level 3
How many shaded triangles will there be in Pattern 25?
3 m
Level 3
A novel has 79 pages. What is the sum of all the page numbers?
3 m
Level 3
The figure shown is a staircase made up of 1-cm cubes. What is the volume of the total number of cubes up to Step 20?
3 m