Number System 56.21 +2.36+5.41 —21.4+1.5=? 54.08 34.08 64.08 44.08 54.08 34.08 64.08 44.08 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 44.08
Number System A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number? 8 3.5 6 None of these 8 3.5 6 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,3(2x + 9) = 752x = 16 => x = 8
Number System Which one of the following represents the sum of the first n even numbers? N2 N(N – 1) N(N + 1) N2+ 1 N2 N(N – 1) N(N + 1) N2+ 1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
Number System A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number? 42 84 21 24 42 84 21 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2/3 x = 28 => x = 4242 * 1/2 = 21
Number System In a two-digit number, if it is known that its unit's digit exceeds its ten's digit by 2 and that the product of the given number and the sum of its digits is equal to 144, then the number is: 24 26 42 46 24 26 42 46 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's digit be x. Then, unit's digit = x + 2. Number = 10x + (x + 2) = 11x + 2 Sum of digits = x + (x + 2) = 2x + 2 (11x + 2)(2x + 2) = 144 2x2 + 26x - 140 = 0 (x - 2)(11x + 35) = 0 x = 2Hence, required number = 11x + 2 = 24.
Number System What number should come in the place of (?) in the following number series ? 1, 4, 9, 25, 49, ?, 169, 289, 361 225 11 121 321 225 11 121 321 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The series is (Prime No.)²So it is (11)² = 121
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