Number System A certain number of two digits is three times the sum of its digits. If 45 be added to it, the digits are reversed. The number is: 27 24 30 22 27 24 30 22 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 27
Number System (3² x 4² x 5) ÷ 36 = (?)² - 80 10 14 16 12 10 14 16 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 3² x 4² x 5/36 + 80= 20 + 80 = 100∴ ? = √100 = 10
Number System {3√4913}² = ? 289 333 121 225 289 333 121 225 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (3√4913)² = (17)² = 289
Number System The difference between a two-digit number and the number obtained by interchanging its two digits is 45. The sum of the digit of the number is 9. What is the product of the two digits of the number? 14 12 13 15 14 12 13 15 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.Therefore, x + y = 9 ..................(i)10x + y - (10y + x) = 4510x + y - 10y - x = 45Therefore, x - y = 5 ..................(ii)From (i) and (ii), x = 7, y = 2Number = 72Therefore, = x x y = 7 x 2 = 14
Number System How many numbers up to 300 and 700 are divisible by 2, 3 and 7 both together? 10 9 8 11 10 9 8 11 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (700 – 300)/42 = 9 22/42 => 9 Numbers
Number System The difference between 35% of a number and 18% of the same number is 93.5 then what is the 40% of that number ? 220 225 245 232 220 225 245 232 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Diff = (35 - 18)% of x = 93.517x/100 = 93.5Therefore, x = 550Therefore, 40% of 550 = 220
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