Recent questions in Class 8

Simplify : $\bigg\{ \bigg(\large\frac{1}{3}\bigg) ^{-2} -\bigg( \large\frac{1}{2}\bigg)^{-3} \bigg\}$ $\div \bigg( \large\frac{1}{4}\bigg)^{-2}$

asked Jun 26, 2015 by meena.p

1 answer

Very small numbers can be expressed in standard form using _________ exponents .

asked Jun 26, 2015 by meena.p

2 answers

Find the value of $(3^{-1} +4^{-1} +5^{-1})^0$

asked Jun 26, 2015 by meena.p

1 answer

Evaluate the exponential expression $(-m)^2 \times (-m)^2$ for $m=3$

asked Jun 26, 2015 by meena.p

1 answer

Find the value of m for which $5^m \div 5^{-3}=5^5$

asked Jun 26, 2015 by meena.p

1 answer

The area of a square is given by the formula $A=c^2$ . What will be the total area of 5 such similar squares, if the side of the square is $7\;cm$

asked Jun 26, 2015 by meena.p

1 answer

$(x^{-1} +4^{-1}+2^{-1} +8^{-1})^x= 1$

asked Jun 26, 2015 by meena.p

1 answer

$(x^{-1} +4^{-1}+2^{-1} +8^{-1})^x= 1$

asked Jun 26, 2015 by meena.p

0 answers

$(x^{-1} +4^{-1}+2^{-1} +8^{-1})^x= 1$

asked Jun 26, 2015 by meena.p

0 answers

Find the value of x so that $\bigg(\large\frac{5}{3} \bigg)^{-2} \times \bigg(\large\frac{5}{3}\bigg)^{-14} =\bigg(\large\frac{5}{3}\bigg)^{8x}$

asked Jun 26, 2015 by meena.p

1 answer

Find the value of n $\large\frac{2^n \times 2^6}{2^{-3}}$ $=2^{18}$

asked Jun 26, 2015 by meena.p

1 answer

If $\large\frac{5^m \times 5^3 \times 5^{-2}}{5^{-}}$ $=5^{12}$ find m.

asked Jun 26, 2015 by meena.p

1 answer

Simplify : $\large\frac{25 \times a^{-4}}{5^{-3} \times 10 \times a^{-6}}$ where $a \neq 10$

asked Jun 25, 2015 by meena.p

1 answer

Simplify: $\sqrt [4]{x^{-3}} \div (\sqrt [6]{x})^{-5}$

asked Jun 25, 2015 by meena.p

1 answer

Simplify : $(3^2)^3 +\bigg( \large\frac{2}{3} \bigg)^0 +3^5 \times \bigg(\large\frac{1}{3} \bigg)^4$

asked Jun 25, 2015 by meena.p

1 answer

Evaluate : $\sqrt[2m] {a^{-5}} \times \sqrt[m]{a^8}$

asked Jun 25, 2015 by meena.p

1 answer

Simplify : $\bigg(x^{\Large\frac{-2}{3}}y ^{\Large\frac{4}{5}}\bigg)^{\large\frac{15}{4}}$

asked Jun 25, 2015 by meena.p

1 answer

Simplify $(64a^3 \div 27 b^{-3} )^{\large\frac{-2}{3}}$

asked Jun 25, 2015 by meena.p

1 answer

Simplify : $\sqrt[3] {x^3 \sqrt[3]{x^3}}$

asked Jun 25, 2015 by meena.p

1 answer

Find the value of $(125)^{\large\frac{-2}{3}} \times (27)^{\large\frac{-2}{3}}$

asked Jun 25, 2015 by meena.p

1 answer

Simplify : $\large\frac{(64)^{\Large\frac{1}{6}} \times (216)^{\Large\frac{-1}{3}} \times (81)^{\Large\frac{1}{4}}}{(512)^{\Large\frac{-1}{3}} \times (16)^{\Large\frac{1}{4}} \times (9)^{\Large\frac{-1}{2}}}$

asked Jun 25, 2015 by meena.p

1 answer

Simplify : $\bigg[ \sqrt[4]{\bigg(\large\frac{1}{x} \bigg) ^{-12}}\bigg]^{\large\frac{-2}{3}}$

asked Jun 25, 2015 by meena.p

1 answer

Simplify : $\bigg[ 3 \sqrt{x^4 y } \times \large\frac{1}{\sqrt [4] {x^2y^8}}\bigg]^{-6}$

asked Jun 25, 2015 by meena.p

1 answer

Simplify : $\large\frac{5^{-2} \times ^{-3} \times (125)^{2/3}}{(27)^{-2/3} \times (32 )^{-1/5}}$

asked Jun 25, 2015 by meena.p

1 answer

In a stack there are 5 books each of thickness $20\;mm$ and 5 papers sheet each of thickness $0.016 \;mm$ . What is the total thickness of the stack

asked Jun 25, 2015 by meena.p

1 answer

The value of $x^{a-b} \times x^{b-c} \times x^{c-a}$ is

asked Jun 25, 2015 by meena.p

1 answer

Find the value of $\bigg( \large\frac{7}{11}\bigg)^{30} \div \bigg( \large\frac{7}{11}\bigg)^{10}$

asked Jun 25, 2015 by meena.p

1 answer

The simplified form of $\bigg( x^{\large\frac{-2}{3}} \times y^{\large\frac{-5}{6}} \bigg)^{-3}$ is

asked Jun 25, 2015 by meena.p

1 answer

Find the value of $\bigg[ \bigg( \large\frac{-2}{3}\bigg) ^{-2} \bigg]^{1}$

asked Jun 25, 2015 by meena.p

1 answer

Simplify : $\bigg( \large\frac{4}{9}\bigg)^{-2} \times \bigg( \large\frac{1}{4} \bigg)^{-2} \times \large\frac{1}{3^{-2}} \times \bigg( \large\frac{17}{18}\bigg)^0$

asked Jun 24, 2015 by meena.p

1 answer

If $x = \bigg[\bigg( \large\frac{2}{3}^2 \bigg]^3 \times \bigg( \large\frac{1}{3} \bigg)^{-2} \times 3^{-1} \times \frac{1}{6}$ find the reciprocal of x

asked Jun 24, 2015 by meena.p

1 answer

Find the reciprocal of the rational number $\bigg( \large\frac{1}{2}\bigg) ^{-2} \div \bigg( \large\frac{2}{3}\bigg)^{-3}$

asked Jun 24, 2015 by meena.p

1 answer

Simplify : $\bigg[\bigg( \large\frac{-2}{3}\bigg)^3 \times \bigg( \large\frac{-2}{3}\bigg)\bigg]$ $\div \bigg( \large\frac{4}{9} \bigg)^2$

asked Jun 24, 2015 by meena.p

1 answer

Solve: $(5^{-1} \times 3^{-1}) \div 6^{-1}$

asked Jun 24, 2015 by meena.p

1 answer

Find the value of $(9^0 -7^0) \times (9+7)$

asked Jun 24, 2015 by meena.p

1 answer

Find the value of $3^0 +4^0 +5^0$

asked Jun 24, 2015 by meena.p

1 answer

Find the value of $(-2ab)^4$ when $a =\large\frac{3}{5}$ $b=\large\frac{-1}{2}$

asked Jun 24, 2015 by meena.p

1 answer

Find the value of $(5x)^3$ when $x= \large\frac{-2}{5}$

asked Jun 24, 2015 by meena.p

1 answer

Simplify : $(3^2- 2^2) \div \bigg( \large\frac{1}{5}\bigg)^2$

asked Jun 24, 2015 by meena.p

1 answer

Simplify : $\bigg[ \bigg( \large\frac{1}{2}\bigg)^2 -\bigg( \large\frac{1}{4} \bigg)^3 \bigg] \times 2^3$

asked Jun 23, 2015 by meena.p

1 answer

Find the value of $(-2)^5 \div \bigg( \large\frac{-1}{3}\bigg)^4$

asked Jun 23, 2015 by meena.p

1 answer

Find the value of $\bigg( \large\frac{-3}{5} \bigg)^4 \times \bigg( \large\frac{1}{3} \bigg)^3$

asked Jun 23, 2015 by meena.p

1 answer

Express in power notation $\large\frac{-27}{343}$

asked Jun 23, 2015 by meena.p

1 answer

Solve : $2^{2x+2} =4^{2x-1}$

asked Jun 23, 2015 by meena.p

1 answer

In a library there are 6 books each of thickness $30\;mm$ and 6 paper sheets each of thickness $0.018\;mm$ . What is the total thickness ?

asked Jun 23, 2015 by meena.p

1 answer

Simplify : $(\sqrt 5 )^{-3}(\sqrt 2 )^{-3}$

asked Jun 23, 2015 by meena.p

1 answer

Simplify : $( \sqrt 4 )^{-3}$

asked Jun 23, 2015 by meena.p

1 answer

Simplify $\ bigg( \large\frac{256}{81}\bigg) ^{\Large\frac{5}{4}}$

asked Jun 23, 2015 by meena.p

1 answer

Simplify : $\large\frac{49 \times t^{-5}}{7^{-3} \times 10 \times t^{-9}}$

asked Jun 23, 2015 by meena.p

1 answer

Simplify : $\large\frac{4^{-3} \times a^{-5} \times b^{-4}}{4^{-5} \times a^{-8} \times b^3}$

asked Jun 23, 2015 by meena.p

1 answer

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