Number System 732.96 + 405.38 - 604.08 - 105.44 + 222.86 = ? 651.68 631.68 621.68 641.68 651.68 631.68 621.68 641.68 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 1361.20 - 709.52 = 651.68
Number System If (47)² is added to the square of a number the answer thus obtained is 2290. What is the number ? 9 8 7 10 9 8 7 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore, x² + (47)² = 2290Therefore, x² = 2290 - 2209 = 81Therefore, x = 9
Number System A basket contains 5 blue, 4 green and 3 red ball. If three balls are picked at random, what is the probability that at least one is red ? 32/51 31/58 34/55 37/52 32/51 31/58 34/55 37/52 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Probability of having no red ball is9C3 / 12C3 = 21/55Probability of having at least one red ball is 1 - 21/55 = 34/55
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 = ? 625 325 525 425 625 325 525 425 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 625
Number System Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number 4 5 15 7.5 4 5 15 7.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5
Number System If the sum of one-half of a number exceeds one-third of that number by 7 1/3, the number is: 30 18 15 20 30 18 15 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,(1/2 x + 1/5 x) - 1/3 x = 22/311/30 x = 22/3x = 20
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