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CDS || Mathematics || Arithmetic || 24-04-2019

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Question 1

A man loses 20% of his money. After spending 25% of the remainder, he has Rs. 480 left. What is the amount of money he originally had?

Question 2

S, T and U together can complete a work in 30 days. If the ratio of efficiency of S, T and U is 20 : 15 : 12 respectively, then in how many days U alone can complete the same work?

Question 3

A sum becomes Rs 2286 in 3 years and Rs 2448 in 4 years at simple interest. What is the rate (in percentage) of interest per annum?

Question 4

What is the number of decimal places in a cube root of a number having 27 decimal places ?

Question 5

The difference between cost price and selling price is Rs 221. If profit percentage is 17%, then what is the selling price (in Rs)?

Question 6

S, T and U started a business by investing Rs 4200, Rs 6300 and Rs 8400 respectively. S left the business after 3 months, T left 6 months after the business had started and U remained in the business till one year. At the end of one year the total profit is Rs 6000. What is the U’s share (in Rs) in the profit?

Question 7

Two bucket contain equal quantity of mixture of milk & water 9 : 5 & 4 : 3 respectively. Both the mixture are mix. Find the ratio of milk to water in the mixture.

Question 8

In our school, class 10 has three sections. These three sections of 40, 50 and 60 students appeared for their board exam and the pass percentage was 100, 90 and 80 respectively. The pass percentage of the whole 10th class batch of the school is

Question 9

A dealer sold two types of goods for Rs 2000 each. On one of them, he lost 16% and on the other he gained 16%. His gain or loss per cent in the entire transaction was

Question 10

A team of 30 men is supposed to do a work in 38 days. After 25 days, 5 more men were employed and the work was finished 1 day earlier. How many days would it have been delayed if 5 more men were not employed.
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