Number System On dividing number by 5, we get 3 as remainder. What will be the remainder when the square of this number is divided by 5? 1 2 0 4 1 2 0 4 ANSWER DOWNLOAD EXAMIANS APP
Number System Twenty times a positive integer is less than its square by 96. What is the integer? 20 30 Cannot be determined 24 20 30 Cannot be determined 24 ANSWER DOWNLOAD EXAMIANS APP
Number System The difference between a two-digit number and the number obtained by interchange the two digits of the number is 27. If the sum of the two digits of the number is 13, what is their product ? 39 38 37 40 39 38 37 40 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.∴ 10x + y - (10y + x) = 27or 9x - 9y = 27∴ x - y = 3 .......(I)x + y = 13 .......(II)From eqn (I) and (II)x = 8 and y = 5.So the number = 85Therefore, product = 8 x 5 = 40
Number System 148 x 3.75 x 4 = 111 x ? 24 20 17 19 24 20 17 19 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 148 x 3.75 x 4/111 = 20
Number System When 732 is subtracted form the square of a number, the answer that is obtained is 5280. What is the number? 103 97 101 99 103 97 101 99 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 - 732 = 5280 x2 = 5280 + (70+3)2 = 5280 + 4900 + 420 + 9 = 10609= 10000 + 2(100)(3) + 32 = (100 + 3)2x = 100 + 3 = 103.
Number System If a + b = 16 and ab = 68, what is the value of a² + b² ? 120 116 124 112 120 116 124 112 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
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