Number System Of an amount, 20% of 25% of 30% is Rs 75. Then what is the original amount ? Rs. 4000 Rs. 3000 Rs. 2000 Rs. 5000 Rs. 4000 Rs. 3000 Rs. 2000 Rs. 5000 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the amount be x.∴ X x 20/100 x 25/100 x 30/100 = 75∴ X = 75 x 5 x 4 x 10/3 = 5000
Number System The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ? 21 years 15 years 25 years 18 years 21 years 15 years 25 years 18 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the father's age be x and son's age yTherefore, x + y = 60 ....................(i)Five years back, (x - 5) = 4 (y - 5)x - 4y = - 15 ......................(2)Solving (1) and (2), x = 45 and y = 15
Number System 480% of 350 + 620% of 275 = ? 5385 4385 2385 3385 5385 4385 2385 3385 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 480 x 350/100 + 620 x 275/100= 1680 + 1705 = 3385
Number System What is the difference between the largest and the smallest number written with 7, 7, 0, 7? 693 6093 6893 6993 693 6093 6893 6993 ANSWER DOWNLOAD EXAMIANS APP
Number System Which one of the following represents the sum of the first n even numbers? N2 N(N + 1) N2+ 1 N(N – 1) N2 N(N + 1) N2+ 1 N(N – 1) ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
Number System What should come in the place of question mark (?) in the number series given below? 159 157 160 158 159 157 160 158 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 160
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