Number System In how many different ways can the letters of word 'BIOLOGY' be arranged ? 2367 2678 2520 2410 2367 2678 2520 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 If the difference between a number and two-fifths of that number is 45 what is the number ? 78 76 75 77 78 76 75 77 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x ∴ x - 2x/5 = 45∴ x = 75
Number System What least number shall be added to 4700 to make it a perfect square ? 61 71 81 91 61 71 81 91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (69)² = 4761 and (68)² = 4624Clerly 4624 < 4700 < 4761So 61 should be added to make 4700 a perfect square.
Number System If 5/7 of a number is 145, what is 180% of that number ? 345.4 365.4 355.4 375.4 345.4 365.4 355.4 375.4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 5/7 = 145∴ x = 145 x 7/5 = 203Now, 203 x 180/100 = 365.4
Number System 63.602 + 153.756 + 94.754 - 84.321 - 122.204 = ? 142.587 141.587 143.587 140.587 142.587 141.587 143.587 140.587 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 312.112 - 170.525 = 141.587
Number System Find the least value of 3x + 4y if x2y3 = 6. 3 10 6 7 3 10 6 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 10
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