Number System Complete the series : 1, 8, 27, 64, 125, 216 ..... 363 373 343 353 363 373 343 353 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 343
Number System 7432 ÷ 32 x ? = 2787 21 12 78 41 21 12 78 41 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7432/32 x ? = 2787= ? = 2787 x 32/7432 = 12
Number System In how many different ways can the letters of word 'BIOLOGY' be arranged ? 2367 2520 2678 2410 2367 2520 2678 2410 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In BIOLOGY total 7 letters are there but O comes twice.∴ Number of arrangements = 7!/2! = 2520
Number System The average of five consecutive even numbers A, B, C, D and E is 54. What is the product of'B' and 'E' ? 2871 3016 4098 1456 2871 3016 4098 1456 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Because, The even numbers are consecutive and their average is 54.∴ The number C will be 54.∴ A = 50, B = 52, D = 56, E = 58B x E = 52 x 58 = 3016
Number System A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is: 18 81 42 24 18 81 42 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's and unit's digit be x and 8/x respectively. Then, (10x + 8/x) + 18 = 10 * 8/x + x 9x2 + 18x - 72 = 0 x2 + 2x - 8 = 0 (x + 4)(x - 2) = 0 x = 2 So, ten's digit = 2 and unit's digit = 4. Hence, required number = 24.
Number System The sum of the digits of a two digit number is 12. If the new number formed by reversing the digits is greater than the original number by 54, then what will be the original number? 49 59 39 69 49 59 39 69 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 39
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