Number System Four-fifth of a number is 10 more than two-third of the same number. What is the number? 89 35 75 91 89 35 75 91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 75
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: 24 42 18 81 24 42 18 81 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 By how much is 3/5th of 875 greater than 2/3 of 333? 362 199 233 303 362 199 233 303 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3/5th of 875 is greater than 2/3rd of 333= 3/5 * 875 - 2/3 * 333= 525 - 222 = 303.
Number System In how many different ways can the letters of word 'BIOLOGY' be arranged ? 2678 2367 2410 2520 2678 2367 2410 2520 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In BIOLOGY total 7 letters are there but O comes twice.∴ Number of arrangements = 7!/2! = 2520
Number System √360 - 225 x 2 + 379 = ? 17 20 18 19 17 20 18 19 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √360 - 225 x 2 + 379 = √360 - 450 + 379 = √289= 17
Number System Which one of the following is the sum of the numbers 1, 3, 5, 7, 9…. up to nth number? N2 N(N + 1)/2 N(N + 1) N2 + 1 N2 N(N + 1)/2 N(N + 1) N2 + 1 ANSWER DOWNLOAD EXAMIANS APP
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