Number System If the three fourth of a number is subtracted from the number; the value so, obtained is 163. What is that number ? 689 692 652 678 689 692 652 678 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number x (1 - 3/4) = 163∴ Number = 163 x 4 = 652
Number System 64% of 2650+40% 0f 320=? 1578 2096 1247 1824 1578 2096 1247 1824 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1824
Number System Of an amount, 20% of 25% of 30% is Rs 75. Then what is the original amount ? Rs. 2000 Rs. 3000 Rs. 5000 Rs. 4000 Rs. 2000 Rs. 3000 Rs. 5000 Rs. 4000 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the amount be x.∴ X x 20/100 x 25/100 x 30/100 = 75∴ X = 75 x 5 x 4 x 10/3 = 5000
Number System What should come in the place of question mark (?) in the number series given below? 157 159 158 160 157 159 158 160 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 160
Number System Sum of the digits number is 8 and their product is 12. Find the difference between the digits? None 2 6 4 None 2 6 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 8xy = 12(x – y)2 = (x + y)2 – 4xy (x – y)2 = 64 – 48 => (x – y) = 4
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 289/290 290/289 1/289 289 289/290 290/289 1/289 289 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,ab = 17, a = 1 and b = 17So, 1/a2 + 1/b2 = (a2 + b2)/a2 b2 = (12 + 172)/(1 * 17)2 = 290/289
EXAMIANS