List of top General Aptitude Questions on Number Systems

The difference of the greatest and the smallest of the fractions $\frac{1}{2}$, $\frac{8}{11}$, $\frac{7}{8}$, $\frac{7}{9}$, $\frac{5}{6}$ is:

In the Delhi zoo, there are some ducks and rabbits. If the heads are counted there are 160, while the legs are 450. What will be the number of ducks in the zoo?

If the mean of 3, 4, 9, 2k, 10, 8, 6 and $(k + 6)$ is 8, and the mode of 2, 2, 3, $2p$, $(2p + 1)$, 4, 4, 5 and 6 (where $p$ is a natural number) is 4, then the value of $k - 2p$ is:

The sum of the digits of a two-digit number is 10. If 18 is subtracted from it, the digits in the resulting number will be equal. The number is:

A 6-digit number has digits as consecutive natural numbers. The number is always divisible by:

For positive non-zero real variables $x$ and $y$, if $$\ln \left( \frac{x + y}{2} \right) = \frac{1}{2} \left[ \ln(x) + \ln(y) \right],$$ then, the value of $\frac{x}{y} + \frac{y}{x}$ is:

In an engineering college of 10,000 students, 1,500 like neither their core branches nor other branches. The number of students who like their core branches is $\frac{1}{4}$ of the number of students who like other branches. The number of students who like both their core and other branches is 500. The number of students who like their core branches is: