Number System What is 432 times 119 ? 51408 53408 52408 50408 51408 53408 52408 50408 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. 432 x 119 = 51408
Number System If the difference between the squares of two consecutive numbers is 47, what is the smaller number ? 25 24 26 23 25 24 26 23 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be (x + 1) and x.Therefore, (x + 1)² - x² = 47x² + 2x + 1 - x² = 472x + 1 = 47Therefore, x = 46/2 = 23
Number System If R2 = S3 = K, where R, S and K are integers. Find the smallest positive integral value of K. (Greater than 1) 54 64 88 75 54 64 88 75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 64
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 ? 6/9 4/9 5/9 3/9 6/9 4/9 5/9 3/9 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 Two third of three- fifth of one fourth of a number is 24, what is 30% of that number? 72 42 90 69 72 42 90 69 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 2/3 * 3/5 * 1/4 = 24x = 240240 * 30/100 = 72
Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 4/5 3/5 3/10 5/4 4/5 3/5 3/10 5/4 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
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