Number System What is the least number to be subtracted from 696 to make it a perfect square? 16 20 1 71 16 20 1 71 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 What is the sum of all the composite numbers up to 20? 128 130 131 132 128 130 131 132 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 = 132
Number System Find the least number when successively divided by 2, 3 and 7 leaves remainders 1, 2 and 3 respectively? 75 65 61 67 75 65 61 67 ANSWER DOWNLOAD EXAMIANS APP
Number System If a + b = 16 and ab = 68, what is the value of a² + b² ? 120 124 116 112 120 124 116 112 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP a + b = 16 Therefore, (a+b)² = (16)² = 256 a² + b² + 2ab = 256Therefore, a² + b² = 256 - 2 x 68Therefore, a² + b² = 256 - 136 = 120
Number System What is the difference between the largest and the smallest number written with 7, 7, 0, 7? 6093 6893 693 6993 6093 6893 693 6993 ANSWER DOWNLOAD EXAMIANS APP
Number System What number should come in the place of (?) in the following number series ? 1, 4, 9, 25, 49, ?, 169, 289, 361 321 121 11 225 321 121 11 225 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The series is (Prime No.)²So it is (11)² = 121
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