Number System 7.8% of 12.5 + 2.5% of 161 = ? 2 9 12 5 2 9 12 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7.8 x 12.5/100 + 2.5 x 161/100= 0.975 + 4.025= 5
Number System If (47)² is added to the square of a number the answer thus obtained is 2290. What is the number ? 7 8 10 9 7 8 10 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore, x² + (47)² = 2290Therefore, x² = 2290 - 2209 = 81Therefore, x = 9
Number System A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number? None of these 6 3.5 8 None of these 6 3.5 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,3(2x + 9) = 752x = 16 => x = 8
Number System 4500 * ? = 3375 1/4 2/5 3/4 3/5 1/4 2/5 3/4 3/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4500 * x = 3375= x = 3375/4500 = 3/4
Number System What least number should be added to 8602 to make it a perfect square ? 51 36 41 47 51 36 41 47 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP So, (93)² = 8649So, the required number to be added to make a perfect square = 8649 - 8602 = 47
Number System If 2^(2x-1) = 8^(3-x), then the value of x is: 5 9 2 6 5 9 2 6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2
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