Recent questions in Class 8

If $166.50$ is the cost of 9 kg of sugar , how much sugar can be purchased for $259$

asked Aug 6, 2015 by meena.p

1 answer

The average of first 80 non zero positive number is

asked Aug 6, 2015 by meena.p

1 answer

If the mean of $a,b,c$ is $M$ and $ab+b+ca=0$ then the mean of $a_2,b_2,c_2$ is

asked Aug 6, 2015 by meena.p

1 answer

The average of 7 number is $13.4$ The average of two of them is $11.6$ , While average of the other two is $14.5 $What is the average of the remaining three numbers ?

asked Aug 6, 2015 by meena.p

1 answer

Mother's age today is thrice as her son's after 10 years it would be just double How much old is the son today ?

asked Aug 6, 2015 by meena.p

1 answer

If 10 years , Anup will be twice as old as Bunny was 10 years ago. If Anup is now 9 years older than Bunny . the present age of Bunny is

asked Aug 6, 2015 by meena.p

1 answer

If 6 years are subtracted from the present age of Gaurav and the remainder is divided by $18$ , then the present age of his grandson Arjun is obtained if Arjun is 2 years younger to Mahesh whose age is 5 years , then what is the present age of Gaurav ?

asked Aug 6, 2015 by meena.p

1 answer

In a street the average age of 15 boys is 19 years . If the age of one more boys is included , the average decreased by $\large\frac{1}{2}$ What is the age of the new boy ?

asked Aug 6, 2015 by meena.p

1 answer

The ratio of vikram's age Anjali's is $3:5$ and the sum of their ages is $80 $ years . The ratio of their ages after 10 years will be

asked Aug 6, 2015 by meena.p

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If a fruit seller sells 'a' oranges for $Rs. x$ , then what is selling price of b oranges ?

asked Aug 6, 2015 by meena.p

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If 8 farmers can crop 80 hectares in 24 days , then now many hectares can 36 former's crop in 30 days

asked Aug 6, 2015 by meena.p

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If the price of 8 toys is $Rs. 432$ what will be the price of 6 toys?

asked Aug 6, 2015 by meena.p

1 answer

On a scale of map $0.4 \;cm$ represents $5.3 \;km$ . If the distance between the points on the map is $64\;cm$ the actual distance between these points is

asked Aug 6, 2015 by meena.p

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The cost of 16 packets of sugar , each weighing 900 grams is $Rs. 28$ What will be the cost of 27 packets , if each packet weight $1\;kg$?

asked Aug 6, 2015 by meena.p

1 answer

In a cloth company a $100\; m$ weaves $0.60$ meters of cloth every second . how many seconds will it take for the $100\;m$ to weave 30 meters of cloth ?

asked Aug 6, 2015 by meena.p

1 answer

If a certain number of labours can dig earth 100 m deep 25 m long and 30 m broad in 12 days , then find the number of days the same number of labours, will required to dig each 75 m deep , 20m long and 50 m broad

asked Aug 6, 2015 by meena.p

1 answer

If $14\;kg$ of pulses cost $Rs. 441$ What is the cost of 22 kg of pulses ?

asked Aug 5, 2015 by meena.p

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The car travels 14 km in 25 minutes if the speed remains the same , how much distance it will cover in 5 hours.

asked Aug 5, 2015 by meena.p

1 answer

The cost of 8 pencils is $Rs. 16$. Find the cost of 5 pencils.

asked Aug 5, 2015 by meena.p

1 answer

If a box of pens is given to 25 children they will get 2 pens each . how many would each get if the number children is reduced by 10?

asked Aug 5, 2015 by meena.p

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A contractor estimates that 5 persons could plumb Ravi's house in 8 days. If he used 6 persons instead of 5, how long should they take to complete the job .

asked Aug 5, 2015 by meena.p

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A bus travels 40 kms in 30 minutes . If the speed of the bus remains same , how far can it travel in 3 hrs?

asked Aug 5, 2015 by meena.p

1 answer

Bacteria enlarged $60000$ times attains a length of bacteria if it is enlarged 10000 times only

asked Aug 5, 2015 by meena.p

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A machine in a pepsi factory fills $680$ bottles in $5\;hrs$ . How many bottles will it fill in $3 \;hrs$

asked Aug 5, 2015 by meena.p

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Suppose $6\;kg$ of salt contains $6 \times 10^7$ crystals. How many crystals are there is in $7\;kg$ of salt.

asked Aug 5, 2015 by meena.p

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A wire of resistance $4R$ is bent in the form of a circle. What is the effective resistance between the ends of diameter ?

asked Jun 29, 2015 by meena.p

1 answer

Evaluate : $S^{-2}$ if $S=5$

asked Jun 27, 2015 by meena.p

1 answer

Divide : $x^8 y^9 \div x^4y^3$

asked Jun 27, 2015 by meena.p

1 answer

If $J=3$ then Solve $(J^3.J^4)^3=?$

asked Jun 27, 2015 by meena.p

1 answer

If $x^3 =-216,x=? $

asked Jun 27, 2015 by meena.p

1 answer

Find the value of x $4^x=1024$

asked Jun 27, 2015 by meena.p

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Find the value of y : $3^{y-1}=81$

asked Jun 27, 2015 by meena.p

1 answer

Simplify $\bigg( \large\frac{V^5m^{-2}}{V^7}\bigg)^2$

asked Jun 27, 2015 by meena.p

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Divide : $\large\frac{x^5 y^3 z^2}{x^3y^2z}$

asked Jun 27, 2015 by meena.p

1 answer

Divide : $ \large\frac{32 a^4\;b^2}{8a^3b^2}$

asked Jun 27, 2015 by meena.p

1 answer

If $x^2$ is added to x, the sum is $42$ Which of the following could be a value of x?

asked Jun 27, 2015 by meena.p

1 answer

Simplify : $V^3.V^5.V^7.W^2.W^4$

asked Jun 26, 2015 by meena.p

1 answer

Simplify $\large\frac{y^6z^{12}}{(yz)^3}$

asked Jun 26, 2015 by meena.p

1 answer

Simplify : $(4x^2 y^7)$

asked Jun 26, 2015 by meena.p

1 answer

Solve: $15b^0 c^8d^{-6}. 7bc^3d^5$

asked Jun 26, 2015 by meena.p

1 answer

What is the value of $(2^3.6) -3^2$

asked Jun 26, 2015 by meena.p

1 answer

Simplify $(2)^3 .(-2)^1.(-2)^2.(-2)^6$

asked Jun 26, 2015 by meena.p

1 answer

Simplify $\large\frac{8x^3y^{-5}}{4x}$

asked Jun 26, 2015 by meena.p

1 answer

To simplify the following expression correctly , what must be done with the exponents? $(25^a)^b$

asked Jun 26, 2015 by meena.p

1 answer

Simplify : $(3mn^4)^3$

asked Jun 26, 2015 by meena.p

1 answer

Simplify : $ \large\frac{9x^4y^5}{6x^2 y^{10}}$

asked Jun 26, 2015 by meena.p

1 answer

Find the value of $(3^0 +4^{-1}) \times 2^2$

asked Jun 26, 2015 by meena.p

1 answer

Simplify : $ \large\frac{25 \times t^{-4}}{5^{-3} \times 10 \times t^{-8}}$

asked Jun 26, 2015 by meena.p

1 answer

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

asked Jun 26, 2015 by meena.p

1 answer

A group of students were given an assignment to collect different types of leaves . The group collected $243$ types of leaves. Represent the number of leaves collected in the form of exponents expression with its base being indivisible.

asked Jun 26, 2015 by meena.p

1 answer

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