Number System The average of five consecutive even numbers A, B, C, D and E is 42. What is the product of B and D ? 2476 1760 4589 3289 2476 1760 4589 3289 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A + B + C + D + E/5 = 42∴ C = 42, ∴ B = 40, ∴ D = 44∴ B x D = 40 x 44 = 1760
Number System What is the difference between the largest number and the least number written with the digits 7, 3, 1, 4? 6084 6184 6048 5084 6084 6184 6048 5084 ANSWER DOWNLOAD EXAMIANS APP
Number System If (35)² is added to the square of a number the answer so obtained is 1394. What is the number ? 17 11 13 15 17 11 13 15 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² + (35)² = 1394Therefore, x² = 1394 - (35)² = 1394 - 1225 = 169Therefore, x = √169 = 13
Number System The simplest form of 1.5 : 2.5 is : 3 : 5 5 : 7 17 : 19 13 : 11 3 : 5 5 : 7 17 : 19 13 : 11 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3 : 5
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? 4 Nothing can be said. 1 6 4 Nothing can be said. 1 6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) – (10y + x) = 54x – y = 6
Number System 728.038 x 54.978 - 72.016 x 85.250 = ? 23900 33900 43900 53900 23900 33900 43900 53900 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 728 x 55 - 72 x 85.25 = 40040 - 6138 = 339900
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