-- Any odd number between 520 and 530 must start with "5 2",
so that's 7 out of the sum of 12 right there. How much is left ?
-- (12 - 7) = 5 . So the missing digit is 5 .
-- The number is 525 .
Check:
-- 525 is odd.
-- 525 is between 520 and 530.
-- (5 + 2 + 5) = 12 .
Yep. It works.
QED, man, QED !
How about: 522
530
520
10 and a half hours
The multiples of 10 between the numbers 526 and 552 are 530, 540, and 550. A multiple is a number easily divisible by another number that leaves no remainder. Therefore, you can arrive at this answer by understanding that any multiple of 10 will be an even number, and that number's final digit will always be a 0.
How about: 522
An odd number can't have 12 as a factor. 528 does have 12 as a factor.
530
520
When there are differences in numbers in motor oil, there is a difference in viscosity. A lower number has lower viscosity and is good for warmer climates. A higher number is good for colder climates.
530 as it is only 3.70 away and 520 is 6.30 away so as 3.70 is smaller than 6.30 the answer is 530
530
530
530
530/70 hours = Seven and four sevenths hours
No.
2 5 53 are the factors of 530