Tag: maths
Questions Related to maths
If the arithmetic mean of $n$ numbers of a series is $\bar{x}$ and sum of the first $(n - 1)$ numbers is $k$, then which one of the following is the nth number of the series ?
The mean marks got by $300$ students in the subject of statistics was $45$. The mean of the top $100$ of them was found to be $70$ and the mean of the last $100$ was known to be $20$, then the mean of the remaining $100$ students is
If $a _{1}=0$ and $a _{1}, a _{2}, a _{3}, ...., a _{n}$ are real numbers such that $|a _{i}|=|a _{i-1}+1|$ for all $i$ then the Arithmetic mean of the numbers $a _{1}, a _{2}, ..., a _{n}$ has value $x$ where
Simplify: $\dfrac{{4 + \sqrt 5 }}{{4 - \sqrt 5 }} + \dfrac{{4 - \sqrt 5 }}{{4 + \sqrt 5 }}$
What fraction of a day is $16$ hours?
Which of the following are true?
(b) $\displaystyle \frac{17}{8}=2.125$
(c) $\displaystyle \frac{327}{500}=0.654$
(d) $\displaystyle \frac{14588}{625}=23.3408$
Solve: $8\dfrac{2}{3}+9\dfrac{3}{8}$
Three number $ A, B$ and $C$ are in the ratio of $12 : 15 : 25 .$ If the some of these numbers be $364$ find the ratio between the difference of $B$ and $A$ and the difference of $C$and $B ?$
The standard from of a rational number -225 / 465 is
Which of the following numbers is in standard form?