.

THE 1998 CHALLENGE

  • Rules: The only numbers you may use are 1, 9, 9, and 8, and you MUST use them each ONE TIME.

  • Use these digits with the PROPER ORDER OF OPERATIONS,
    +, -, x, /, ^(raised to a power), square root, cube root, and factorial,
    to write expressions equal to each of the numbers in the chart below.

  • Your answers must be written in the boxes with no other equal signs using
    grouping symbols where  needed.
    Correct format: 98 = (1+9)x9+8. Incorrect format: 1 + 9 =10 x 9 = 90 + 8 = 98.

  • Also, two digit numbers (such as 19, 91, 98, 99) may not be used.

*It is possible to make all 100 numbers!

Please enter your name.

1 = 35 = 69 =
2 = 36 = 70 =
3 = 37 = 71 =
4 = 38 = 72 =
5 = 39 = 73 =
6 = 40 = 74 =
7 = 41 = 75 =
8 = 42 = 76 =
9 = 43 = 77 =
10 = 44 = 78 =
11 = 45 = 79 =
12 = 46 = 80 =
13 = 47 = 81 =
14 = 48 = 82 =
15 = 49 = 83 =
16 = 50 = 84 =
17 = 51 = 85 =
18 = 52 = 86 =
19 = 53 = 87 =
20 = 54 = 88 =
21 = 55 = 89 =
22 = 56 = 90 =
23 = 57 = 91 =
24 = 58 = 92 =
25 = 59 = 93 =
26 = 60 = 94 =
27 = 61 = 95 =
28 = 62 = 96 =
29 = 63 = 97 =
30 = 64 = 98 =
31 = 65 = 99 =
32 = 66 = 100 =
33 = 67 =    
34 = 68 =    

Square Root: Don't forget, if you need a "3", you can make one by using the square root of 9 or .
Once you have your three, you can use it like this example:...........18 = x + (1 + 8)  

Cube Root: A cube root is similar to a Square Root. It is the number which when taken to the third power or "cubed" gives you the number under the radical symbol. Ex: = 2, because 2 to the third power = 8.

Factorial: Is a mathematical operation involving multiplying all of the positive integers from 1 to the number with the factorial sign.
For example: three factorial is written 3! and it means 1 x 2 x 3 = 6.
I have found that by using the square root of 9 which equals 3 and then applying the factorial, I can create a
six from one of the "9" digits......ex:......! = 6........Try it out on your calculator, it's really cool.
Once you can use factorial notation, a lot of numbers can be found like this one: 23 = 1 x ! + 9 + 8.