Number System In how many different ways can the letters of the word 'DETERMINE' be arranged ? 61480 62480 63480 60480 61480 62480 63480 60480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. of arrangements = 9! / 3! Because, E comes 3 times = 60480
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% ? 17 litre 29 litre 21 litre 25 litre 17 litre 29 litre 21 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 ? 124 116 120 112 124 116 120 112 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 486+32×25—59=? 567 582 528 596 567 582 528 596 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 528
Number System A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number? 24 21 42 84 24 21 42 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2/3 x = 28 => x = 4242 * 1/2 = 21
Number System Difference between two numbers is 5, six times of the smaller lacks by 6 from the four times of the greater. Find the numbers? 10, 5 12, 7 12, 9 11, 6 10, 5 12, 7 12, 9 11, 6 ANSWER DOWNLOAD EXAMIANS APP
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