12
Q:

# If n is natural number , then $6n2+6n$ is always divisible by :

 A) 6 only B) 6 and 12 both C) 12 only D) by 18 only

Answer:   B) 6 and 12 both

Explanation:

$6n2+6n=6nn+1$, which is always divisible by 6 and 12 both, since n(n+1) is always even.

Q:

Which number will fit in '?' place in the following series?

12, 23, 45, 89, ?

 A) 175 B) 176 C) 177 D) 178

Explanation:

5 1232
Q:

Assuming that the numbers in each of the following figures follow a similar pattern, select the option that can replace the question mark (?) in figure C.

 A) 61 B) 21 C) 16 D) 81

Explanation:

1 233
Q:

The equation of a line is given by 4y-6x+9=0. Find the slope of other line which is perpendicular to it.

 A) -2/3 B) 2/3 C) 3/2 D) -3/2

Explanation:

1 357
Q:

What will be the 20th term in the given sequence?

-50, -47, -44, _

 A) -10 B) 10 C) -7 D) 7

Explanation:

9 1761
Q:

In the given series of numbers how many 7's are there which are immediately followed by 9 and immediately not preceeded by 5 ?

 A) 6 B) 2 C) 1 D) 4

Explanation:

3 546
Q:

The value of $1+22+23+24+...+29$ is

 A) 255 B) 511 C) 1021 D) 2047

Explanation:

9 1127
Q:

In an arithmetic progression if 13 is the 3rd term, -­47 is the 13th term, then ­-17 is which term?

 A) 9 B) 10 C) 7 D) 8

Explanation:

5 1007
Q:

What is the value of (81 + 82 + 83 + ......... +130)?

 A) 5275 B) 10550 C) 15825 D) 21100

Explanation: