Number System Find the least value of 3x + 4y if x2y3 = 6. 6 7 10 3 6 7 10 3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 10
Number System Which one of the following is the sum of the numbers 1, 3, 5, 7, 9…. up to nth number? N2 + 1 N2 N(N + 1) N(N + 1)/2 N2 + 1 N2 N(N + 1) N(N + 1)/2 ANSWER DOWNLOAD EXAMIANS APP
Number System The product of two consecutive position odd numbers is 6723. What is the smaller number? 74 71 79 83 74 71 79 83 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP n x (n + 2) = 6723= n² + 2n - 6723 = 0= n² + 83n - 81n - 6723 = 0= n(n + 83) - 81 (n + 83) = 0Therefore, (n - 81) (n + 83) = 0Therefore, n = 81, n + 2 = 83
Number System 7.8% of 12.5 + 2.5% of 161 = ? 2 5 12 9 2 5 12 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7.8 x 12.5/100 + 2.5 x 161/100= 0.975 + 4.025= 5
Number System The product of two consecutive odd numbers is 4623. What is the product of the next two consecutive odd numbers ? 8795 7745 6782 5183 8795 7745 6782 5183 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √4623 = 6767 x 69 = 4623∴ Required product = 71 x 73 = 5183
Number System How many numbers up to 100 are divisible by 7? 93 107 100 14 93 107 100 14 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 100/7 = 14 2/7 => 14 Numbers
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