Number System 217 * 217 + 183 * 183 = ? 79698 81268 80578 80698 79698 81268 80578 80698 ANSWER DOWNLOAD EXAMIANS APP
Number System In how many different ways can the letters of the word 'LEASE' be arranged ? 60 40 80 None of these 60 40 80 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The world LEASE consists of 5 letters in which E comes twice ∴ 51/21 = 5x4x3x2x1/2x1 = 60
Number System The sum of a number and its reciprocal is one-eighth of 34. What is the product of the number and its square root? 32 27 None of these 8 32 27 None of these 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,x + 1/x = 34/8 8x2 - 34x + 8 = 0 4x2 - 17x + 4 = 0 (4x - 1)(x - 4) = 0 x = 4required number = 4 * √4 = 4 * 2 = 8.
Number System In a 150-litre mixture of milk and water, the percentage of milk is 84%. How much water should be added so that the percentage of milk becomes 52.5% ? 90 litre 80 litre 95 litre 85 litre 90 litre 80 litre 95 litre 85 litre ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In 150 litre, milk is 84%ie 150 x 84/100 = 126 litre Let us add x litres of waterTherefore, the quantity of mixture = 150 + x∴ 52.5% of (150 + x) = 126 litres 150 + x = 126x100/52.5 = 240 litres∴ x = 240 - 150 = 90 litres
Number System The product of two consecutive odd numbers is 4623. What is the product of the next two consecutive odd numbers ? 6782 5183 8795 7745 6782 5183 8795 7745 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √4623 = 6767 x 69 = 4623∴ Required product = 71 x 73 = 5183
Number System 5358 * 51 = ? 273348 273358 273268 273258 273348 273358 273268 273258 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5358 * 51 = 5358 * (50 + 1) = 5358 * 50 + 5358 * 1= 267900 + 5358 = 273258
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