Number System 17580 x 1.8 - 13720 x 2.1 = ? x 2.4 1180 1160 1120 1140 1180 1160 1120 1140 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2.4 x ? = 31644 - 28812 = 2832∴ ? = 2832/2.4= 1180
Number System Sum of square of first number and cube of second number together is 568. Also square of the second number is 15 less than square of 8. What is the value of three-fifth of the first number ? 7 6 8 9 7 6 8 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the first number be x and the second number be y.∴ y² = 82 - 15 = 64 - 15 = 49∴ y = 7∴ x² + 73 = 568= x² + 343 = 568= x² + 568 - 343 = 225∴ x = √225 = 15∴ 15 x 3/5 = 9
Number System 432+2170+35=? 678 523 729 494 678 523 729 494 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 494
Number System Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is: 6 4 10 5 6 4 10 5 ANSWER DOWNLOAD EXAMIANS APP
Number System 3√103823 = ? 52 47 41 44 52 47 41 44 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 3√103823 = 3√47 x 47 x 47 = 47
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 28 years 30 years 31 years 29 years 28 years 30 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
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