Number System If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ? 50 47 49 48 50 47 49 48 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48
Number System Find the greatest number which leaves the same remainder when it divides 25, 57 and 105. 18 16 12 8 18 16 12 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 105 - 57 = 4857 - 25 = 32105 - 25 = 80The H.C.F of 32, 48 and 80 is 16.
Number System Supply the missing figure : 2, 6, 12, 20, 30 ... 56 41 42 39 40 41 42 39 40 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 42
Number System The sum of the ages of a son and father is 65 years. After 5 years the age of father will be double of the age of son. What is the age of son ? 17 years 19 years 20 years 18 years 17 years 19 years 20 years 18 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the age of the son be x and the age of the father be y.Therefore, x + y = 65 ..........(i)or, 2 x (x + 5) = (y + 5)or, 2x + 10 = y + 5or, 2x - y = 5 ...................(ii)From equations (i) and (ii), x = 20, y = 45
Number System 8988 / 8 / 4 = ? 561.75 4494 280.875 2247 561.75 4494 280.875 2247 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8988 * 1/8 * 1/4 = 2247/8 = 280.875
Number System The sum of three consecutive multiples of 3 is 72. What is the largest number? 24 36 27 21 24 36 27 21 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be 3x, 3x + 3 and 3x + 6.Then,3x + (3x + 3) + (3x + 6) = 729x = 63x = 7Largest number = 3x + 6 = 27.
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