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Which of the following numbers will completely divide (325 + 326 + 327 + 328)?
11
16
25
30
Correct Answer:
30
Explanation:
(3
25
+ 3
26
+ 3
27
+ 3
28
) = 3
25
x (1 + 3 + 3
2
+ 3
3
) = 3
25
x 40
= 3
24
x 3 x 4 x 10
= (3
24
x 4 x 30), which is divisible by30.
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