Number System If HKUJ means FISH, what does UVCD mean ? STAR STAK STAM STAB STAR STAK STAM STAB ANSWER EXPLANATION DOWNLOAD EXAMIANS APP STAB
Number System A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is: 24 18 81 42 24 18 81 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's and unit's digit be x and 8/x respectively. Then, (10x + 8/x) + 18 = 10 * 8/x + x 9x2 + 18x - 72 = 0 x2 + 2x - 8 = 0 (x + 4)(x - 2) = 0 x = 2 So, ten's digit = 2 and unit's digit = 4. Hence, required number = 24.
Number System Sum of square of first number and cube of second number together is 568. Also square of the second number is 15 less than square of 8. What is the value of three-fifth of the first number ? 7 6 9 8 7 6 9 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the first number be x and the second number be y.∴ y² = 82 - 15 = 64 - 15 = 49∴ y = 7∴ x² + 73 = 568= x² + 343 = 568= x² + 568 - 343 = 225∴ x = √225 = 15∴ 15 x 3/5 = 9
Number System How many numbers up to 100 are divisible by 7? 14 93 100 107 14 93 100 107 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 100/7 = 14 2/7 => 14 Numbers
Number System Find the number of factors of 300 excluding 1 and itself. 14 15 16 18 14 15 16 18 ANSWER DOWNLOAD EXAMIANS APP
Number System The sum of two numbers is 25 and their difference is 13. Find their product. 114 325 315 104 114 325 315 104 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then x + y = 25 and x - y = 13.x = 19; y = 6xy = 19 * 6 = 114
EXAMIANS