Number System What should come in place of question mark (?) in the following number series ? 7, 176, 480, 1058, 2188, 4426, ? 8888 8882 8881 8884 8888 8882 8881 8884 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Series is (No. + 9²) x 2, (+8²) x 2, (+7²) x 2, (+6²) x 2.......
Number System What is the difference between the local value of 7 and 5 in the number 2574? 430 413 570 403 430 413 570 403 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 500 – 70 = 430
Number System The difference between a two-digit number and the number obtained by interchange the two digits of the number is 27. If the sum of the two digits of the number is 13, what is their product ? 40 37 39 38 40 37 39 38 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.∴ 10x + y - (10y + x) = 27or 9x - 9y = 27∴ x - y = 3 .......(I)x + y = 13 .......(II)From eqn (I) and (II)x = 8 and y = 5.So the number = 85Therefore, product = 8 x 5 = 40
Number System Find the least number with which 16200 should be multiplied, to make it a perfect cube. 48 360 36 45 48 360 36 45 ANSWER DOWNLOAD EXAMIANS APP
Number System Subtracting 30 from a number, the remainder is one fourth of the number. Find the number? 22 1/2 45 40 30 22 1/2 45 40 30 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3/4 x = 30 => x = 40
Number System The difference between 45% of a number and 18% of the same number is 145.8. What is 30% of that number ? 245 188 162 141 245 188 162 141 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.45% of x - 18% of x = 145.8∴ x/100 (45 - 18) = 145.8∴ x = 145.8 x 100/27 = 540∴ 30% of 540 = 540 x 30/100 = 162
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