4
Q:

# If a positive integer n, divided by 5 has a remainder 2, which of the following must be true?

 A) n is odd B) n + 1 cannot be a prime number C) (n + 2) divided by 7 has remainder 2 D) n + 3 is divisible by 5

Answer:   D) n + 3 is divisible by 5

Explanation:

You can find the integers which when divided by 5 have a remainder 2 by adding 2 to all multiples of 5. So we have n = 7 , 12, 17, 22 etc.

From this series we can see that n does not have to be odd.

Also n + 1 can be a prime because, for example, 12 + 1 = 13

And (n + 2) / 7 has a remainder 2 in some cases but not all.

Remember the question asks us for what MUST be true, and we see that none of the statements are true in all cases. However, adding 3 to any of the values of n will always give a multiple of 5.

Subject: Numbers
Exam Prep: GRE
Q:

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

12, 23, 45, 89, ?

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

Explanation:

Filed Under: Numbers
Exam Prep: Bank Exams

7 1830
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.

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Explanation:

Filed Under: Numbers
Exam Prep: Bank Exams

1 438
Q:

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

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Explanation:

Filed Under: Numbers
Exam Prep: Bank Exams

2 550
Q:

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

-50, -47, -44, _

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Explanation:

Filed Under: Numbers
Exam Prep: Bank Exams

9 2523
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 ?

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Explanation:

Filed Under: Numbers
Exam Prep: Bank Exams

3 743
Q:

The value of $1+22+23+24+...+29$ is

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

Explanation:

Filed Under: Numbers
Exam Prep: Bank Exams , CAT

9 1396
Q:

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

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Explanation:

Filed Under: Numbers
Exam Prep: Bank Exams

5 1180
Q:

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

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