Number System If the difference between a number and its 2/5 is 240, find the number. 400 360 440 480 400 360 440 480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore x - 2x/5 = 240, Therefore, 3x/5 = 240Therefore, x = 240x5/3 = 400
Number System What should come in place of question mark (?) in the following number series ? 7, 176, 480, 1058, 2188, 4426, ? 8882 8884 8881 8888 8882 8884 8881 8888 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Series is (No. + 9²) x 2, (+8²) x 2, (+7²) x 2, (+6²) x 2.......
Number System 728.038 x 54.978 - 72.016 x 85.250 = ? 43900 33900 53900 23900 43900 33900 53900 23900 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 728 x 55 - 72 x 85.25 = 40040 - 6138 = 339900
Number System 4.78% of 1255 + 3.24% of 440=0.5% of ? 14849 13849 12849 11849 14849 13849 12849 11849 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 0.5 x ?/100 = 4.78 x 1255/100 + 3.24 x 440/100= 59.989 + 14.256∴ ? = 74.245 x 100/0.5 = 14849
Number System How many numbers up to 300 and 700 are divisible by 2, 3 and 7 both together? 9 11 8 10 9 11 8 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (700 – 300)/42 = 9 22/42 => 9 Numbers
Number System The product of two consecutive position odd numbers is 6723. What is the smaller number? 71 79 74 83 71 79 74 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
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