Number System 17580 x 1.8 - 13720 x 2.1 = ? x 2.4 1180 1160 1140 1120 1180 1160 1140 1120 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2.4 x ? = 31644 - 28812 = 2832∴ ? = 2832/2.4= 1180
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 85 litre 95 litre 90 litre 80 litre 85 litre 95 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 4/6 of 6/5 of 5/7 of a number is 96. Find the number. 168 162 170 164 168 162 170 164 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 4/6 x 6/5 x 5/7 = 96∴ x = 96 x 6 x 5 x 7/4 x 6 x 5 = 168
Number System The average age of seven boys sitting in a row facing North is 26 years. If the average age of first three boys is 19 years and the average age of last three boys is 32 years, what is the age of the b 29 years 30 years 28 years 31 years 29 years 30 years 28 years 31 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Age of the fourth boy = (26 x 7 - 3 x 19 - 3 x 32) years = (182 - 57 - 96) years = 29 years
Number System (12)² - (4.4)² - (0.04)² = ? 131.6384 125.6384 124.6384 129.6384 131.6384 125.6384 124.6384 129.6384 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (12)² - (4.4)² - (0.04)²= 144 - 19.36 - 0.0016= 124.64 - 0.0016= 124.6384
Number System √343 = ? 19 20 18 21 19 20 18 21 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √343 = 18
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