List of top General Aptitude Questions on Number Systems

How many 3-digit numbers can be formed using three distinct single digit prime numbers?

The product of the digits of a three-digit number is 70. The sum of the digits of this three-digit number is ______

\(P\), \(Q\), \(R\), \(S\), \(X\), and \(Y\) are distinct single-digit whole numbers taking values from 0 to 9.

\(PQ\) is a two-digit number with \(Q\) being in the units place and \(P\) in the tens place. Similarly, \(RS\) is a two-digit number.

It is known that \(PQ\) and \(RS\) are consecutive numbers and \((PQ)^2+(RS)^2=XYP\), with \(XYP\) being a three-digit number.

The value of \(Y\) is

Based on the relationship between each polygon and the number inside it, the value of 'X' is ______

\(P\) and \(Q\) are two positive integers such that \(P^2=Q^2+13\).

The product of the numbers \(P\) and \(Q\) is __________

\(P\) and \(Q\) are two positive integers such that \(P^2 = Q^2 + 13\).
The product of the numbers \(P\) and \(Q\) is ______

How many 3-digit numbers can be formed using three distinct single digit prime numbers?

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:

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:

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?

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: