Difference between revisions of "2007 iTest Problems/Problem 3"
(→Solution) |
m (→Solution) |
||
| Line 8: | Line 8: | ||
<math>28\Rightarrow 1+2+4+7+14=28\not>28</math> | <math>28\Rightarrow 1+2+4+7+14=28\not>28</math> | ||
| − | <math>56\Rightarrow 1+2+4+7+8+14+28= | + | <math>56\Rightarrow 1+2+4+7+8+14+28=64>56</math> |
Thus, <math>56\Rightarrow \boxed{\mathrm{C}}</math> is the answer. | Thus, <math>56\Rightarrow \boxed{\mathrm{C}}</math> is the answer. | ||
Revision as of 21:52, 9 February 2024
Problem
An abundant number is a natural number that's proper divisors' sum is greater than the number. Which one of the following natural numbers is an abundant number?
Solution
Thus, 
is the answer.
See Also
| 2007 iTest (Problems, Answer Key) | ||
| Preceded by: Problem 2 |
Followed by: Problem 4 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 • 26 • 27 • 28 • 29 • 30 • 31 • 32 • 33 • 34 • 35 • 36 • 37 • 38 • 39 • 40 • 41 • 42 • 43 • 44 • 45 • 46 • 47 • 48 • 49 • 50 • 51 • 52 • 53 • 54 • 55 • 56 • 57 • 58 • 59 • 60 • TB1 • TB2 • TB3 • TB4 | ||
