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rtaha2412
Which of the following integers is a divisor of(15!+13)?


a 15
b 14
c 13
d 7
e 2

Similar questions testing the same concept:
factor-factorials-100670.html
gmat-prep-ds-96091.html
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15! + 13 is divisible by which of the following ?

A. 15
B. 14
C. 13
D. 7
E. 2

What integer is expression 15!+13 evenly divisible by?

Since both 15! and 13 are divisible by 13, 15! + 13 is divisible by 13.

Answer: C
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If \(n=15!+13\), which of the following is a divisor of \(n\)?

A. 15
B. 14
C. 13
D. 7
E. 2


\(n=15! + 13 = 1*2*3*...12*13*14*15+13\). Since 13 is a factor of both \(15!\) and the additional 13 in the expression, we can conclude that 13 is a divisor of \(n\). In other words, we can factor out 13 from the expression to get \(n=13*(1*2*3*...12*14*15+1)\), hence 13 is definitely a divisor of \(n\).


Answer: C
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