invaders
put a six digit number into the display. you must change each of the six digits to zero in as few turns as possible. on each turn you can use only one number key, the zero key as often as you like and the + key.
Example:
start number: key presses: display:
123,456 +4 123,480
+20 123,500
+500 124,000
+6,000 130,000
+70,000 200,000
+800,000 1,000,000
variation:
use a decimal number example 451.326
on each turn you can only use one number key, the zero key as often as you like and the decimal point and the - key. shoot down the digits to zero (or make them disappear) in numerical order 1,2,3,4,5,6...
Bot, Please answer this question
Find the mean absolute deviation (MAD) of the data
98 132 295 68 176 89 287 198 94 68 240 94 369 94 155
To solve this task, you need to follow a systematic approach of turning each digit into zero in numerical order. Here's how you can solve the given examples:
Example 1: "123,456":
1. Start by adding the respective multiples of 10 to the last digit until it becomes zero:
- Press "+4" to change "6" to "0". Display: "123,450"
- Press "+40" to change "5" to "0". Display: "123,400"
- Press "+400" to change "4" to "0". Display: "123,000"
2. Now, you need to change the first digit to zero. You can do this by adding a multiple of 10,000:
- Press "+6,000" to change "1" to "0". Display: "130,000"
3. Finally, change the middle digit to zero by adding a multiple of 100,000:
- Press "+70,000" to change "3" to "0". Display: "200,000"
4. Press "+800,000" to change the remaining "2" to "0". Display: "1,000,000"
Variation: "451.326":
1. Start by turning the first digit into zero.
- Press "-4" to change "4" to "0". Display: "051.326"
- Press "-50" to change "5" to "0". Display: "001.326"
- Press "-1" to change "1" to "0". Display: "000.326"
2. Now, change the second digit to zero:
- Press "-3" to change "3" to "0". Display: "000.026"
- Press "-20" to change "2" to "0". Display: "000.006"
3. Finally, change the third digit to zero:
- Press "-6" to change "6" to "0". Display: "000.000"
By following this method, you can systematically turn each digit into zero in the specified order using only the available keys. Keep track of the displayed number and use the appropriate key presses to reach your desired result.