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| 1 | |
Find the next term in the pattern 0, 7, 26, 63, 124, ... |
| | A) | 155 |
| | B) | 181 |
| | C) | 197 |
| | D) | 215 |
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| 2 | |
Select a two-digit number at random. Reverse the digits. Subtract the smaller number from the larger number. What pattern do you see? Are there any two-digit numbers which will not match the pattern? |
| | A) | There is no pattern. |
| | B) | The result is always divisible by 9. The pattern does not work for numbers with both digits the same. |
| | C) | The result is always divisible by 9. The pattern does not work if the original number is divisible by 9. |
| | D) | The result is always divisible by 6. The pattern does not work for numbers with both digits the same. |
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| 3 | |
A square-based pyramid is made up of sugar cubes. Each layer has a side length one greater than the layer above it. The top layer has one sugar cube. How many cubes are required to make up a pyramid with a bottom layer 8 cubes on a side? |
| | A) | 64 |
| | B) | 140 |
| | C) | 204 |
| | D) | 249 |
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| 4 | |
The current population of the world is about 6.5 billion. How long ago was it about half as much?
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| | A) | 40 years |
| | B) | 30 years |
| | C) | 20 years |
| | D) | 10 years |
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