Number System If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ? 47 48 50 49 47 48 50 49 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48
Number System The difference between 78% of a number and 59% of the same number is 323. What is 62% of that number ? Rs. 986 Rs. 1054 Rs. 926 Rs. 945 Rs. 986 Rs. 1054 Rs. 926 Rs. 945 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.78% of x - 59% of x = 323= 78x - 59x/100 = 323= 19x/100 = 323∴ x = 323 x 100/19 = 1700= 62% of 1700 = 1700 x 62/100 = 1054
Number System Find the greatest number which leaves the same remainder when it divides 25, 57 and 105. 16 12 18 8 16 12 18 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 56.21 +2.36+5.41 —21.4+1.5=? 44.08 34.08 54.08 64.08 44.08 34.08 54.08 64.08 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 44.08
Number System The sum of the numbers is 264. If the first number be twice the second and third number be one-third of the first, then the second number is: 54 48 84 72 54 48 84 72 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the second number be x. Then, first number = 2x and third number = 2x/3.2x + x + 2x/3 = 26411x/3 = 264x = 72
Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 382 396 378 343 382 396 378 343 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
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