Number System In how many different ways can the letters of the word ANATOMY be arranged ? 2504 2520 2510 2508 2504 2520 2510 2508 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Here total letters are 7 but A comes twice.Therefore, Numbers of arrangements = 7!/2! = 2520
Number System The average of five consecutive even numbers A, B, C, D and E is 42. What is the product of B and D ? 4589 1760 2476 3289 4589 1760 2476 3289 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A + B + C + D + E/5 = 42∴ C = 42, ∴ B = 40, ∴ D = 44∴ B x D = 40 x 44 = 1760
Number System How many numbers between 300 and 800 can be by using digits 2, 4, 5, 6 and 0 ? 56 36 52 48 56 36 52 48 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∴ Reqd . numbers = 3 x 4P2 = 3 x 12 = 36
Number System Complete the series : 1, 8, 27, 64, 125, 216 ..... 373 363 343 353 373 363 343 353 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 343
Number System A laborer is engaged for 30 days on the condition that he receives Rs.25 for each day he works and is fined Rs.7.50 for each day is absent. He gets Rs.425 in all. For how many days was he absent? 9 6 8 10 9 6 8 10 ANSWER DOWNLOAD EXAMIANS APP
Number System If a + b = 16 and ab = 68, what is the value of a² + b² ? 120 116 124 112 120 116 124 112 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP a + b = 16 Therefore, (a+b)² = (16)² = 256 a² + b² + 2ab = 256Therefore, a² + b² = 256 - 2 x 68Therefore, a² + b² = 256 - 136 = 120
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