PS-Arithmetic

PS Questions from Arithmetic

Each of 435 bags contains at least one of the following three items: raisins,
Concept: The question tests on Overlapping sets Solution: Let there be 3 overlapping sets of Raisins, Almonds and Peanuts. Let "only peanuts&q...
Tue, 12 Oct, 2021 at 12:58 PM
In the sequence a1,a2,a3,…, an, an=an−1+1
  Concept:  The question tests on applications of Sequences Solution: Given a1 = b and an=a n−1+1 a2 = a1 + 1 = b + 1 a3 = a2 + 1 = (b + 1) + 1 = b + 2...
Tue, 12 Oct, 2021 at 12:58 PM
A bath can be filled by the cold water pipe in 10 min and by hot water pipe in 15 min (independently each). A person
Concept:  The question tests on application of Rates(Time and Work) Solution: Work done by the cold water pipe in 1 minute = 1/10 Work done by the cold w...
Tue, 12 Oct, 2021 at 12:58 PM
In a certain class consisting of 36 students, some boys and some girls
Concept:- The question tests on abilities to eliminate options Solution: Use the options here and eliminate them. A.9 cannot be expressed as sum of...
Tue, 12 Oct, 2021 at 12:58 PM
The increase in the number of matches produced in California from 1980 to 1990 exceeds
Concept: The question tests on Per cent and Interest  Solution: California in 1980 = 0.33 of 1.2 * 10^9 California in 1990 = 0.33 of 1.6 * 10^9 From 198...
Tue, 12 Oct, 2021 at 12:59 PM
For all x ≠ 0 and y ≠ 0,
Concept:  The question tests on Functions and Graphs Solution: We use the rule of exponents where a^m∗a^n=a^m+n and a^m/a^n=a^(m−n) x6y3y/y6x3x=x6y4/y6x4...
Tue, 12 Oct, 2021 at 12:59 PM
If the cost price of 50 articles is equal to the selling price of 40 articles
Concept:  The question tests on Profit and Loss Solution: This is one of the variants of PLD. 40SP = 50CP Isolating SP, we get SP = 1.25CP 1.25 is 0.25...
Tue, 12 Oct, 2021 at 12:59 PM
In a recent trip, Morris drove from town A to town B and
Concept:  The question tests on TSD Solution: Average speed over 2 equal distances travelled at speeds a and b is = 2aba+b2aba+b If we get the speeds, we...
Tue, 12 Oct, 2021 at 12:59 PM
Ramesh has two examinations on Wednesday - Engineering mathematics in the morning and Engineering
Concept:  The question tests on Rates Solution: Let the total time taken to read = t 80M + 100D = t ... (1) and 50M + 250D = t ... (2) Time taken to re...
Tue, 12 Oct, 2021 at 12:59 PM
If x and y are positive integers, what is the value of xy
Concept: The question tests on HCF/LCM as a DS question Solution: This is a very simple question on the concepts of HCF and LCM. From the question data, w...
Tue, 12 Oct, 2021 at 1:00 PM