Number System If (47)² is added to the square of a number the answer thus obtained is 2290. What is the number ? 10 9 7 8 10 9 7 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore, x² + (47)² = 2290Therefore, x² = 2290 - 2209 = 81Therefore, x = 9
Number System A, B, C, D and E are consecutive even numbers respectively. The average of 5 numbers is 82. What is the product of C and E ? 6353 6373 6363 6383 6353 6373 6363 6383 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + x + 1 + x + 2 + x + 3 + x + 4 = 5 x 82= 5x + 10 = 410 = 5x = 400= x = 400/5 = 80 ∴ A = 80C = 82and E = 84= C x E = 82 x 84 = 6383
Number System Find the nearest to 25268 which is exactly divisible by 467? 25228 25208 25308 25218 25228 25208 25308 25218 ANSWER DOWNLOAD EXAMIANS APP
Number System √343 = ? 18 19 21 20 18 19 21 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √343 = 18
Number System (3² x 4² x 5) ÷ 36 = (?)² - 80 12 10 16 14 12 10 16 14 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 3² x 4² x 5/36 + 80= 20 + 80 = 100∴ ? = √100 = 10
Number System The difference between 68% of a number and 35% of the same number is 1216. What is 28% of the number ? 1043.75 1027.75 1031.75 1037.75 1043.75 1027.75 1031.75 1037.75 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
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