Number System If the difference between a number and its 2/5 is 240, find the number. 440 400 480 360 440 400 480 360 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore x - 2x/5 = 240, Therefore, 3x/5 = 240Therefore, x = 240x5/3 = 400
Number System In a division sum, the remainder is 0. As student mistook the divisor by 12 instead of 21 and obtained 35 as quotient. What is the correct quotient? 13 0 20 12 13 0 20 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number = (12 * 35) = 420Correct quotient = 420/21 = 20
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 ? 18 years 25 years 15 years 21 years 18 years 25 years 15 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
Number System 16.23 x 12.9 + 17.32 = ? 226.687 None of these 236.687 246.687 226.687 None of these 236.687 246.687 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 16.23 x 12.9 + 17.32= 209.367 + 17.32= 226.687
Number System A shopkeeper purchased 200 bulbs for Rs. 10 each. However, 5 bulbs were fused and had to be thrown away. The remaining were sold at Rs. 12 each. What will be percentage profit? 14 21 17 33 14 21 17 33 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 12
Number System √207.36 = ? 16.7 14.4 15.7 12.3 16.7 14.4 15.7 12.3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √207.36 = √20736/√100 = 144/10 = 14.4
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