A trader purchase a wrist watch and a pendulum for $Rs.$ $390.$ He sells them making a profit of $10 \%$ on the watch and $15 \%$ on the pendulum. He earns a profit of $Rs$. $51.50 .$ The difference between the original prices of the pendulum and the watch is equal to? (in $Rs.$)
$80$
$120$
$110$
$100$
Maninder bought two horses at $Rs.\, 40,000$ each. He sold one horse at $15 \%$ gain, but had to sell the second horse at a loss. If he had suffered a loss of $Rs.3,600$ on the whole transaction, then the selling price of the second horse is (in $Rs.$)
Seema purchased an item for $Rs.\, 9600$ and sold it for loss of $5$ percent. From that money she purchased another item and sold it for gain of $5$ percent. What is her overall gain/loss?
The labelled price of a cupboard is $Rs$ $6500 .$ The shopkeeper sold it by giving $5 \%$ discount on the labelled price and earned a profit of $15 \% .$ What approximately is the cost price of the cupboard? (in $Rs.$)
A merchant buys $4000\, kg$ of wheat, one$-$fifth of which he sells at a gain of $5$ per cent, one$-$fourth at a gain of $10 \%$, one-half at a gain of $12$ percent, and the remainder at a gain of $16$ percent. If he had sold the whole at a gain of $11$ percent, he would have made $Rs.\, 72.80$ more. What was the cost price of the crop per kg? (in $Rs.$)
A tradesman gives $4 \%$ discount on the marked price and gives $1$ book free for buying every $15$ books and thus gains $35 \% .$ The marked price is increased above the cost price by (appx.) (in $\%$)