What number is a positive integer less then 100?
With that number, add 7 more, is it a multiple of 3?
The sum of the digit of the # is a multiple of 5?
2007-09-26 11:22:12 · 4 answers · asked by Beatriz B 2 in Science & Mathematics ➔ Mathematics
You have 99 choices for positive integers less than 100.
1, 2, 3, 4, ..., 99
Adding 7 will result in values like:
8, 9, 10, ..., 106
Some of these are multiples of 3 (3, 6, 9, ... , 105) the rest are not.
If you add the digits, some number will get you a multiple of 5, others will not.
5 is one number that meets all your criteria (5 + 7 = 12)
14 is another number (14 + 7 = 21)
23 is another number (23 + 7 = 30)
32 is another number (32 + 7 = 39)
41 is another number (41 + 7 = 48)
50 is another number (50 + 7 = 57)
2007-09-26 11:27:56 · answer #1 · answered by Puzzling 7 · 0⤊ 0⤋
Here is your answer:
Positive integers that are less than 100:
1..99
With that number, add 7 more, is it a multiple of 3?
2,5,8,11,14,17,20,23,26,29,32,35,38,
41,44,47,50,53,56,59.62,65,68,71,74,
77,80,83,86,89,92,95 and 98
The Sum of the digit of the # is a multiple of 5?
5,14,19,23,28,32,37,41,46,50,
55,64,69,73,78,82,87,91 and 96
2007-09-26 19:01:36 · answer #2 · answered by Peter A 1 · 0⤊ 0⤋
Hi,
The number is 50.
50+7 = 57 which is 3*19
5+0=5
Take Care
2007-09-26 18:33:19 · answer #3 · answered by lewanj 3 · 0⤊ 0⤋
No offense, but I think you're taking the lazy way out. You could easily solve it by trying different numbers.No one should give you the answer cuz then there would not be a point in it being homework.
2007-09-26 18:27:07 · answer #4 · answered by angelgal5382 2 · 0⤊ 0⤋