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When a is divided by b the remainder is 13.When c is divided by d the remainder is 12.
If a,b,c,d are all positive integers then which of these may be the value of b+d?
1)23
2)24
3)25
4)26
5)27
Important rule:
When positive integer N is divided by positive integer D, the remainder R is such that 0 < R < DFor example, if we divide some positive integer by 7, the remainder can be 6, 5, 4, 3, 2, 1, or 0
Likewise, if we divide some positive integer by 4, the remainder can be 3, 2, 1, or 0
In the original question, we're told that,
when a is divided by b the remainder is 13So, b must be greater than
13.
In other words, b COULD equal 14, 15, 16, 17, ....
We're also told that,
c is divided by d the remainder is 12So, d must be greater than
12.
In other words, d COULD equal 13, 14, 15, 16, ....
So, the smallest possible value of b+d is 14+13
In other words, b+d COULD equal 27
Answer: E
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