search
Log In
0 votes
55 views

The expression $3^{2n+1} + 2^{n+2}$ is divisible by $7$ for

  1. all positive integer values of $n$
  2. all non-negative integer values of $n$
  3. only even integer values of $n$
  4. only odd integer values of $n$
in Numerical Ability
recategorized by
55 views

1 Answer

1 vote

 

Option (A) is the correct answer.

0

if you put n=0, then also it is divisible by 7.

So, the answer will be:- B.all non-negative integer values of n

Related questions

1 vote
1 answer
1
72 views
The coefficient of $x^2$ in the product $(1+x)(1+2x)(1+3x) \dots (1+10x)$ is $1320$ $1420$ $1120$ None of these
asked Sep 18, 2019 in Numerical Ability gatecse 72 views
1 vote
2 answers
2
107 views
Let $S=\{0, 1, 2, \cdots 25\}$ and $T=\{n \in S: n^2+3n+2$ is divisible by $6\}$. Then the number of elements in the set $T$ is $16$ $17$ $18$ $10$
asked Sep 18, 2019 in Numerical Ability gatecse 107 views
1 vote
1 answer
3
70 views
Let $a$ be the $81$ – digit number of which all the digits are equal to $1$. Then the number $a$ is, divisible by $9$ but not divisible by $27$ divisible by $27$ but not divisible by $81$ divisible by $81$ None of the above
asked Sep 18, 2019 in Numerical Ability gatecse 70 views
1 vote
1 answer
4
78 views
The highest power of $3$ contained in $1000!$ is $198$ $891$ $498$ $292$
asked Sep 18, 2019 in Numerical Ability gatecse 78 views
...