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 = ? 525 325 625 425 525 325 625 425 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 625
Number System A shopkeeper purchased 200 bulbs for Rs. 10 each. However, 5 bulbs were fused and had to be thrown away. The remaining were sold at Rs. 12 each. What will be percentage profit? 14 21 33 17 14 21 33 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 12
Number System The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is: None of these 40 20 30 None of these 40 20 30 ANSWER DOWNLOAD EXAMIANS APP
Number System The product of two consecutive odd numbers is 4623. What is the product of the next two consecutive odd numbers ? 5183 6782 7745 8795 5183 6782 7745 8795 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √4623 = 6767 x 69 = 4623∴ Required product = 71 x 73 = 5183
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 15 18 20 30 15 18 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
Number System Sum of the digits number is 8 and their product is 12. Find the difference between the digits? 4 6 None 2 4 6 None 2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 8xy = 12(x – y)2 = (x + y)2 – 4xy (x – y)2 = 64 – 48 => (x – y) = 4
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