570
Q:

# if the price of a book is first decreased by 25% and then increased by 20%, then the net change in the price will be  :

 A) 10 B) 20 C) 30 D) 40

Explanation:

Let the original price be Rs. 100.

New final price  = 120 %  of (75 % of Rs. 100) = Rs. [(120/100) * (75/100) * 100] = Rs. 90.

Decrease = 10%

Q:

A runner is running at a speed of 40 kim/h. If he runs at a speed of 30 km/h, then what will the decrease in the percentage of his speed be?

 A) 30% B) 25% C) 20% D) 15%

Explanation:

1 105
Q:

If each edge of a cube is increased by 10%, then the percentage increase in its surface area is:

 A) 22% B) 19% C) 20% D) 21%

Explanation:

1 296
Q:

A can finish a piece of work in a certain number of days. B takes 45% more number of days to finish the same work independently. They worked together for 58 days and then the remaining work was done by B alone in 29 days. In how many days could A have completed the work, had he worked alone?

 A) 110 days B) 118 days C) 98 days D) 120 days

Explanation:

0 163
Q:

The marked price and cost price of a book are and , respectively. The discount in percentage is:

 A) 8 % B) 12 % C) 15 % D) 10 %

Explanation:

5 310
Q:

If 40% of a number is less than its 60% by 30, then the 20% of that number is:

 A) 40 B) 50 C) 30 D) 60

Explanation:

1 472
Q:

If the single discount equivalent to successive discounts of 20% and x% is 24%, then the value of x is:

 A) 6% B) 5% C) 4% D) 8%

Explanation:

0 605
Q:

A crate of fruits contains one spoiled fruit for every 25 fruits. 60% of the spoiled fruits were sold. If the seller had sold 48 spoiled fruits, then the number of fruits in the crate were:

 A) 3000 B) 2000 C) 1200 D) 2400

Explanation:

0 206
Q:

The cost price of 12 pens is equal to the selling price of 8 pens. The profit percentage is:

 A) 50% B) 45% C) 40% D) 55%