FIND THAT NUMBER
By Achernar
Based on information provided to you about a number, you have to say what that number is. Though a pencil and paper might be helpful, they aren't strictly necessary. Enjoy!
1. A natural number is doubled when added to its reciprocal. Find that number!
1/2
2
1
0
2. The logarithm (base ten) of five hundred times an integer is three. Find that number!
450
8
1500
3. A natural number is halved when reduced by thirteen. Find that number!
4. Twice a negative integer is eight less than its square. Find that number!
16
18
-2
-6
5. A positive integer is equal to 4 times its reciprocal. Find that number!
-4
9
3
6. The sum of the square of a negative integer and itself is zero. Find that number!
-1
7. The product of a positive integer and the integer that succeeds it is twelve. Find that number!
5
27
6
8. The digit in the units place of a two-digit number exceeds that in the tens place by one. If the number is equal to four times the sum of its digits, find that number! - A two digit number.
9. A number added to twice itself gives twenty-one. Find that number! - It is a number.
10. The fourth power of a positive integer is equal to four times its square. Find that number!
4