Our common denary system - Answers
Q1. 7283 is made up as follows:
| Thousands | Hundreds | Tens | Units |
| 7 | 2 | 8 | 3 |
Q2. 149 is made up as follows:
| Thousands | Hundreds | Tens | Units |
| 1 | 4 | 9 |
Q3. There are 10 different symbols in the denary system: 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9.
Q4. After units, then tens, then hundreds, then thousands, the next number is ten thousands.
Q5. The 'worth' of each position in a denary number is as follows:
100 = 1
101 = 10
102 = 100
103 = 1000
104 = 10000
105 = 100000
106 = 1000000
107 = 10000000
Q6 - Q7. All the answers are 1. Any number to the power of zero is 1.
100
50
450
60
20
10
Q8. The answers are as follows:
20 = 201
13 = 131
89343 = 893431
2 = 21
2343 = 23431
1 = 11
Q9. Any number to the power of 1 is itself.
Q10. 'Denary' originally comes from Latin. The origin is in the latin word 'denarius', which means 'containing 10'.
Q11. 'Binary' originally comes from Latin. The origin is in the latin word 'binarius', which means 'two by two' .
Q12. The binary system uses two digits, 0 and 1.