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 The difference between 68% of a number and 35% of the same number is 1216. What is 28% of the number ? 1027.75 1037.75 1031.75 1043.75 1027.75 1037.75 1031.75 1043.75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be xTherefore 68x / 100 - 35x / 100 = 1216 Therefore x = 1216 x 100 / 33Therefore 28% of x = 28x / 100 = 1216 x 100 / 33 x 28 / 100= 1216 x 100 x 28 / 33 x 1/100 = 1031.75
Number System Which choice provides the answer in the following : If 2 * 3 = 36, 5 * 4 = 400, 6 * 2 = 144, 3 * 3 = 81; then, 5 * 5 = ? 525 625 325 425 525 625 325 425 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 625
Number System The digit in unit's place of a three digit number is thrice the digit in ten's place & the digit in hundred's place is two-third of the digit in ten's place. If the sum of three digits of number is 14 221 215 239 211 221 215 239 211 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's digit be x.∴ Unit's digit = 3xHundered's digit = 2x/3∴ x + 3x + 2x/3 = 14= 3x + 9x + 2x = 14 x 3= 14x = 14 x 3= x = 3∴ Number = 239
Number System The square root of 0.0081 is: 0.9 0.91 0.009 0.09 0.9 0.91 0.009 0.09 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 0.09
Number System (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = ? 30.52 28.56 29.81 27.54 30.52 28.56 29.81 27.54 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = 70.84 - 40.32 = 30.52
EXAMIANS