Number System If (17)3 is subtracted from the square of a number, the answer so obtained is 2143. What is the number ? 83 82 81 84 83 82 81 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (17*17*17) = 2143or x² = 2143 + 4913 = 7056∴ x = 84
Number System How many numbers between 300 and 800 can be by using digits 2, 4, 5, 6 and 0 ? 56 52 36 48 56 52 36 48 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∴ Reqd . numbers = 3 x 4P2 = 3 x 12 = 36
Number System Complete the series : 1, 2, 3, 5, 8, 13 .... 1 7 4 9 1 7 4 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1
Number System If the average of two numbers is 88.5 and one number is 5.5 less than the average. Find out the next number. 94 91 97 86 94 91 97 86 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 94
Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 3/5 5/4 3/10 4/5 3/5 5/4 3/10 4/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/x - x = 9/20 20x2 + 9x - 20 = 0 20x2 + 25x - 16x - 20 = 0 5x(4x + 5) -4(4x + 5) = 0(4x + 5)(5x - 4) = 0x = 4/5
Number System In a division sum, the quotient is 120, the divisor 456 and the remainder 333, find the dividend? 50553 5553 56053 55053 50553 5553 56053 55053 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 120 * 456 + 333 = 55053