Number System Let R = qs—4. When s=8, R=16. When s=10, R is equal to 20 22 21 23 20 22 21 23 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21
Number System A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number? None of these 3.5 6 8 None of these 3.5 6 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,3(2x + 9) = 752x = 16 => x = 8
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? 12 15 13 14 12 15 13 14 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 16.23 x 12.9 + 17.32 = ? None of these 226.687 246.687 236.687 None of these 226.687 246.687 236.687 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 16.23 x 12.9 + 17.32= 209.367 + 17.32= 226.687
Number System If R2 = S3 = K, where R, S and K are integers. Find the smallest positive integral value of K. (Greater than 1) 64 54 88 75 64 54 88 75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 64
Number System If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ? 124 163 146 179 124 163 146 179 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² - (83)² = 8487x² = 8487 + (83)²x² = 8487 + 6889x² = 15376Therefore, x² = 15376 x = 124
EXAMIANS