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Quantitative Aptitude Quiz (NABARD/RBI) : 19.03.18

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Question 1

The average of 11 consecutive natural numbers is ‘R’. By how much will the average increase if the next four natural numbers are also added?

Question 2

A and B can type a certain number of pages in 20 minutes and 30 minutes respectively. They started working together on a book but after the completion of 100 pages, A left for some other work. If the book of total 204 pages was finished in 3 hours from the time they started together, then find the number of pages that A can type in 1 hour.

Question 3

Sunil defrauds both the trader and the buyer by measuring weights incorrectly. When he is purchasing items from the trader, he takes 29% more than the indicated weight and when he is selling them to the buyer, he gives 25% less than the indicated weight. If the price that Sunil charges his buyer is the same as what the trader charges Sunil, then what profit percentage does the Sunil make?

Question 4

Men, women and their children are building walls. 2 man and a child built some walls in a day which are equivalent to 2 walls plus walls built by a woman in a day. If a man, 3 woman and 2 children worked together, they build 8 walls in a day. If 6 men, 4 women and k children worked together, they will build 20 walls in a day.
This information along with the value of k was given to a mathematician and was asked how many walls each individual can build in a day. Mathematician couldn’t answer the question saying there are various answers possible. What is the value of k?

Question 5

A tank of capacity 60 litres has two inlets pipes (of the same capacity) and one outlet pipe. When all the three are opened together, it takes 8 min to fill the cistern. If the outlet flow rate is increased 1.5 times, the tank is never filled. Find the minimum flow rate of the outlet for this to happen.

Question 6

Container A contains milk and water in the ratio 5 : 7 while container B contains milk and water in the ratio 1 : 3. Now, another container C has to be filled from these two containers such that after mixing the ratio of milk to water in container C is 7 : 13. Find the quantity (in litres) of pure milk in the mixture taken from container A, if the volume of container C is 40 litres.

Question 7

Two balls of material 1 and material 2 are of same radius. Density of material2 is twice of material1. Cost of material1 is Rs.100/kg and material2 is Rs.150/kg. Both are melted and mixed to make a ball of material3 of density (3/8)^th of material1’s density. The new ball cost price is 50% more than the combined cost of two balls. What is the Cost price (in Rs./kg) of the material3?

Question 8

A certain amount of money at compound interest becomes Rs 4500 in 4 years and Rs 4770 in 5 years. Find the rate of interest per annum.

Question 9

Seema went to a local supermarket to buy a dress which costs Rs. 480. The shopkeeper gave her various discount schemes. Which one of the following will be best for the shopkeeper?

Question 10

20 men or 30 women can finish a work in 10 days. If 10 women and 10 men start working together but after 4 days, 5 women and 6 men left the work. In how many days will the remaining men and women complete the work?

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