Respuesta :
Answer:
255
Step-by-step explanation:
They can buy petrol on all the days, so it must follow these following conditions.
Each of the digits less than 6.
Odd(the last digit can be 1,3, or 5).
Sum of the three digits greater than 10
Multiple of 3. This means that the sum of the digits must be divisible by 3.
Sum of the digits less than 15. So, between 11 and 14.
At least two of the digits are the same
Total value less than 500. Which means that the first digits can be from 1 to 4.
Following all these conditions
The answer is 255
Answer:
their car's number-plate is 255
Step-by-step explanation:
let x,y,z represent the three digits respectively
The given conditions are;
Sunday: if each of the three digits was less than 6
x,y,z < 6
Monday: if the 3-digit number was odd
z = odd numbers less that 6
Tuesday: if the sum of the three digits was greater than 10
x+y+z > 10
Wednesday: if the 3-digit number was a multiple of 3
x+y+z = divisible by 3
Thursday: if the sum of the three digits was less than 15
x+y+z < 15
Friday: if at least two of the three digits were the same
x
Saturday: if the 3-digit number was less than 500
x < 5
(x = 1 to 4)
Since
x+y+z > 10
x+y+z < 15
x+y+z = divisible by 3
Then x+y+z = 12
z is odd numbers less that 6
z = (1,3,5)
x = (1,2,3,4)
y = (1,2,3,4,5)
The only combination that satisfies other conditions is;
x = 2
y = 5
z = 5
their car's number-plate is 255
