Number System If 1.5 x= 0.04 y, then the value of (y-x) (y+x) is: 77/73 73/77 93/77 83/77 77/73 73/77 93/77 83/77 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 73/77
Number System {(742)² ÷ 36} ÷ 2 = ? 421.5 423.5 422.5 420.5 421.5 423.5 422.5 420.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (174 x 174/36) ÷ 2 = 841/2 = 420.5
Number System The difference between 72% of a number and 49% of the same number is 575. What is 9% of that number ? 275 225 245 295 275 225 245 295 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x.Therefore, 72% of x - 49% of x = 575Therefore, (72 - 49)% of x = 575Therefore, 9% of x = 575/23 x 9 = 225
Number System (12)² - (4.4)² - (0.04)² = ? 131.6384 129.6384 124.6384 125.6384 131.6384 129.6384 124.6384 125.6384 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (12)² - (4.4)² - (0.04)²= 144 - 19.36 - 0.0016= 124.64 - 0.0016= 124.6384
Number System Complete the series : 81, 69, 58, 48, 39 ........ 28 31 30 29 28 31 30 29 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 31
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 ? 15 years 25 years 18 years 21 years 15 years 25 years 18 years 21 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
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