Number System The square root of 0.0081 is: 0.009 0.9 0.09 0.91 0.009 0.9 0.09 0.91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 0.09
Number System In a five-litre mixture of milk and water the portion of water is 30%. How much milk should be added to the mixture so that the portion of water reduces to 5% ? 21 litre 29 litre 17 litre 25 litre 21 litre 29 litre 17 litre 25 litre ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Original mixture = 5 litre; Milk = 3.5 litre;Water = 1.5 litre Let x litre of milk be added so thatthe mixture becomes (x + 5) litres and the percentage of water becomes 5%So, 1.5 = (x + 5) x 5/10030 = x + 5∴ x = 25 litre
Number System If a + b = 16 and ab = 68, what is the value of a² + b² ? 116 120 112 124 116 120 112 124 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 One-eighth of a number is 76. What will be 54% of the number ? 332.32 321.32 318.32 328.32 332.32 321.32 318.32 328.32 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore, 1/8 of x = 76Therefore, x = 60854% of 608 = 608 x 54/100 = 328.32
Number System If the product of two successive positive integers is 4692, what is the smaller number ? 64 68 70 66 64 68 70 66 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∵ 68 x 69 = 4692
Number System 106 * 106 - 94 * 94 = ? 1904 2000 1906 2400 1904 2000 1906 2400 ANSWER DOWNLOAD EXAMIANS APP
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