Number System (3² x 4² x 5) ÷ 36 = (?)² - 80 16 14 12 10 16 14 12 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 3² x 4² x 5/36 + 80= 20 + 80 = 100∴ ? = √100 = 10
Number System The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is: 40 None of these 20 30 40 None of these 20 30 ANSWER DOWNLOAD EXAMIANS APP
Number System (95.6x 910.3) ÷ 92.56256 = 9? 13.34 15.54 12.24 14.44 13.34 15.54 12.24 14.44 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 13.34
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% ? 25 litre 21 litre 29 litre 17 litre 25 litre 21 litre 29 litre 17 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 A number when multiplied by five times of itself give the value equal to 1445. What is the number ? 16 17 18 15 16 17 18 15 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17
Number System 7.8% of 12.5 + 2.5% of 161 = ? 9 2 12 5 9 2 12 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7.8 x 12.5/100 + 2.5 x 161/100= 0.975 + 4.025= 5
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