RAILWAY GROUP D QUANT QUIZ 2

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Question 1:

if $a+\frac{1}{a}+2=0$, then the value of $\left(a^{37}-\frac{1}{a^{100}}\right)$

Question 2:

The difference between the selling prices of an item at a profit of $9 \%$ and $7 \%$ was Rs. 190 . Find the cost price of the item.

Question 3:

An amount invested at simple interest gives Rs. 2000 interest at rate of $10 \%$ in 4 years. What is the principal $(\operatorname{in} Rs.)$ ?

Question 4:

If $a+b=16$ and $a b=63$, then the value of $(a$ $-b)^{3}$ is?

Question 5:

If 21 is added to a number, it becomes 7 less than thrice of the number. Then the number is:

Question 6:

A train travelling at the speed of x km/h crossed a 200m long platform in 30 seconds and overtook a man walking in the same direction at the speed of 6 km/h in 20 second . What is the value of x ?

Question 7:

A and B together can do a piece of work in 16 days $B$ and $C$ together can do the same work in $9 \frac{3}{5}$ days. After A has been working for 5 days and $B$ for 8 days $C$ finishes it in 12 days. In how many days will C alone be able to do the $33 \frac{1}{3} \%$ of work.

Question 8:

The ratio of milk and water in the mixture of $5: 2$. If 42 liters of mixture is replaced with water then the ratio of milk and water becomes $2: 5$. What was the initial quantity of milk in the mixture.

Question 9:

Mr. Kiran buys a toy for Rs. 40 and sells it for Rs. 45 . Find the gain percentage.

Question 10:

Divide Rs. 162 in the ratio 2: 3: 6: 7. The rupees in the respective ratios are given by: