Number System What should come in the place of ' ? ' in the following number series ? 2, 5, 9, 19, 37, ? 77 78 76 75 77 78 76 75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2 x 2 + 1 = 5;5 x 2 - 1 = 99 x 2 + 1 = 19: 19 x 2 - 1 = 3737 x 2 + 1 = 75
Number System Sum of two consecutive even terms lacks by 98 from their product. Find the sum of these number 32 24 18 None 32 24 18 None ANSWER DOWNLOAD EXAMIANS APP
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% ? 85 litre 80 litre 95 litre 90 litre 85 litre 80 litre 95 litre 90 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 Find the least value of 3x + 4y if x2y3 = 6. 7 3 6 10 7 3 6 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 10
Number System 148 x 3.75 x 4 = 111 x ? 24 19 20 17 24 19 20 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 148 x 3.75 x 4/111 = 20
Number System The difference between 71% of a number and 46% and of the same number is 212. What is 75% of that number 636 845 673 724 636 845 673 724 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ 71% of x - 46% of x = 212∴ (71 - 46)% of x = 212∴ 25/100 x x = 212∴ x = 212 x 4 = 848∴ 75% of 848 = 848 x 75/100 = 636
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