Number System The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference of the two digits of the number ? 3 2 1 4 3 2 1 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) - (10y + x) = 36,9(x - y) = 36/9 = 4
Number System (√6 + 1)² = ? + 2√6 5 6 7 8 5 6 7 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (√6 + 1)² - 2√6= (√6)² + 2 x √6 + 1 + 1² - 2√6= 6 + 2√6 + 1 - 2√6 = 6 + 1 = 7
Number System 50% of 8/15 of 9/4 of 5/3 of 333 = ? 444 555 333 666 444 555 333 666 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 50% of [8x9x5/15x4x3 x 333]= 50% of 666= 333
Number System If the numerator of a fraction is increased by 200% and the denominator by 300%, the fraction thus obtained is 1/36. What is the original fractions ? 3/9 5/9 6/9 4/9 3/9 5/9 6/9 4/9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the fractions be x/yx + 200% of x/y + 300% of y = 1/3= x + 2x/y + 3y = 1/3= 3x/4y = 1/3Hence x/y = 4/9
Number System The sum of three consecutive even numbers is 252. What is the sum of the smallest and the largest numbers? 171 169 170 168 171 169 170 168 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 168
Number System What number should come in the place of (?) in the following number series ? 1, 4, 9, 25, 49, ?, 169, 289, 361 121 225 321 11 121 225 321 11 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The series is (Prime No.)²So it is (11)² = 121
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