Number System If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their square is: 28 180 12 160 28 180 12 160 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then, x + y = 20 and x - y = 8x2 - y2 = (x + y)(x - y) = 20 * 8 = 160.
Number System What is the least number to be subtracted from 696 to make it a perfect square? 20 16 71 1 20 16 71 1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The numbers less than 696 and are squares of certain numbers are 676, 625.The least number that should be subtracted from 696 to make it perfect square = 696 - 676 = 20.
Number System 17580 x 1.8 - 13720 x 2.1 = ? x 2.4 1120 1140 1180 1160 1120 1140 1180 1160 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2.4 x ? = 31644 - 28812 = 2832∴ ? = 2832/2.4= 1180
Number System ?2704 x ?2209=? 3444 1444 4444 2444 3444 1444 4444 2444 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2444
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 289 289/290 1/289 290/289 289 289/290 1/289 290/289 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
Number System 1827÷ 36 x ?=162.4 4.3 2.6 1.9 3.2 4.3 2.6 1.9 3.2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3.2
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