Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 3/5 5/4 4/5 3/10 3/5 5/4 4/5 3/10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/x - x = 9/20 20x2 + 9x - 20 = 0 20x2 + 25x - 16x - 20 = 0 5x(4x + 5) -4(4x + 5) = 0(4x + 5)(5x - 4) = 0x = 4/5
Number System A man engaged a servant on the condition that he would pay him Rs.710 and a uniform after a year service. He served only for 8 months and got Rs.460 and a uniform. Find the price of the uniform? Rs.30 Rs.40 Rs.20 Rs.25 Rs.30 Rs.40 Rs.20 Rs.25 ANSWER DOWNLOAD EXAMIANS APP
Number System √343 = ? 19 18 21 20 19 18 21 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √343 = 18
Number System 4550 ÷ 25% of ? = 130 140 135 125 130 140 135 125 130 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4550 ÷ ? x 25/100 = 130= 4550 ÷ ?/4 = 130= 4550 x 4/? = 130= ? x 130 = 4550 x 4= ? = 4550 x 4/130 = 140
Number System Which one of the following represents the sum of the first n even numbers? N2+ 1 N(N – 1) N(N + 1) N2 N2+ 1 N(N – 1) N(N + 1) N2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
Number System 1256+4813+765=? 6831 6836 6834 6839 6831 6836 6834 6839 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1256+4813+765= 6069+765=6834
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