Number System The difference between 45% of a number and 18% of the same number is 145.8. What is 30% of that number ? 162 188 141 245 162 188 141 245 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.45% of x - 18% of x = 145.8∴ x/100 (45 - 18) = 145.8∴ x = 145.8 x 100/27 = 540∴ 30% of 540 = 540 x 30/100 = 162
Number System Twenty times a positive integer is less than its square by 96. What is the integer? 30 24 Cannot be determined 20 30 24 Cannot be determined 20 ANSWER DOWNLOAD EXAMIANS APP
Number System 5358 * 51 = ? 273258 273268 273348 273358 273258 273268 273348 273358 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5358 * 51 = 5358 * (50 + 1) = 5358 * 50 + 5358 * 1= 267900 + 5358 = 273258
Number System 7.8% of 12.5 + 2.5% of 161 = ? 12 9 2 5 12 9 2 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7.8 x 12.5/100 + 2.5 x 161/100= 0.975 + 4.025= 5
Number System How many figures are required to number the pages the pages of a book containing 365 pages? 967 987 977 897 967 987 977 897 ANSWER DOWNLOAD EXAMIANS APP
Number System The difference between the two digit number and the number obtained by interchanging its digits is 54. The difference between the digits is? 1 4 6 Nothing can be said. 1 4 6 Nothing can be said. ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) – (10y + x) = 54x – y = 6
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