Number System The difference between two integers is 5. Their product is 500. Find the numbers. 21, 26 20, 25 30, 25 15, 20 21, 26 20, 25 30, 25 15, 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the integers be x and (x + 5). Then, x(x + 5) = 500 x2 + 5x - 500 = 0 (x + 25)(x - 20) = 0 x = 20So, the numbers are 20 and 25.
Number System A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number? 84 24 21 42 84 24 21 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2/3 x = 28 => x = 4242 * 1/2 = 21
Number System If the numberator of a fraction is increased by 50% and denominator by 20% the fraction become 9/15. What was the original fraction ? 3/5 12/25 6/7 13/25 3/5 12/25 6/7 13/25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the fraction be x/yWe have 150x/120y = 9/15= x/y = 12/25
Number System What is the difference between the local values of 3 in the number 53403? 0 3003 2997 3030 0 3003 2997 3030 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3000 – 3 = 2997
Number System How many numbers up to 300 and 700 are divisible by 2, 3 and 7 both together? 11 10 8 9 11 10 8 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (700 – 300)/42 = 9 22/42 => 9 Numbers
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