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Quantitative Ability

Quantitative Ability or the section on Mathematics in CAT and other MBA entrance exams is a bottle neck for many MBA aspirants. But to excel in the section, all you need is conceptual clarity and regular practice is all you need.... more



Verbal Ability & RC

Verbal Ability and Reading Comprehension comprises an important part of the CAT paper and the section often gives hiccups to the candidates. But Reading is the only solution through which you can get a grip over the section. ...more


Recommended Reading

Know the books which are absolute must haves for your study table while you are preparing for CAT 2011. This section will give you the information on the highlights of the book, author and publication. ...more


Topper Mantras

They have been there and done that. The CAT toppers over the years will give you their tips and strategies to tame the CAT and win it! ...more


Question of the day

A student instead of finding the value of 7/8 of the number, found the value of 7/18 of the number. If his answer differed from the actual one by 770, find the number?

Question on Number Theory

Difficulty level: Moderate

1) If m and n are integers divisible by 5, which of the following is not necessarily true?

a) (m – n) is divisible by 5.
b) (m2 – n2) is divisible by 25
c) (m + n) is divisible by 10
d) None of these

2) log2 [log7 (x^2 – x + 37)] = 1, then what could be the value of x?

a) 6.
b) 5
c) 4
d) 7

3) P and Q are two positive integers such that PQ = 64. Which of the following cannot be the value of P + Q?

a) 20
b) 16
c) 65
d) 35

4) A student instead of finding the value of 7/8 of the number, found the value of 7/18 of the number. If his answer differed from the actual one by 770, find the number?

a) 1584
b)  584
c) 1728
d) 1656

5) If n is an integer, how many values of n will give an integral value of (16n^2 + 7n + 6)/n?

a) 2
b) 3
c) 4
d) 5