Number System {(742)² ÷ 36} ÷ 2 = ? 423.5 420.5 421.5 422.5 423.5 420.5 421.5 422.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (174 x 174/36) ÷ 2 = 841/2 = 420.5
Number System If (35)² is added to the square of a number the answer so obtained is 1394. What is the number ? 15 13 17 11 15 13 17 11 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² + (35)² = 1394Therefore, x² = 1394 - (35)² = 1394 - 1225 = 169Therefore, x = √169 = 13
Number System In how many different ways can the letters of the word 'DETERMINE' be arranged ? 60480 62480 63480 61480 60480 62480 63480 61480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. of arrangements = 9! / 3! Because, E comes 3 times = 60480
Number System The difference between a number and its three-fifth is 50. What is the number? None of these 75 125 100 None of these 75 125 100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x - 3/5 x = 50 => 2/5 x = 50x = (50 * 5)/2 = 125.
Number System In how many different ways can be the letters of the word PENCIL be arranged among themselves ? 640 860 720 510 640 860 720 510 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total six letters are there and hence the number of arrangements = 6! = 6 x 5 x 4 x 3 x 2 x 1 = 720
Number System How many numbers between 300 and 800 can be by using digits 2, 4, 5, 6 and 0 ? 56 48 36 52 56 48 36 52 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∴ Reqd . numbers = 3 x 4P2 = 3 x 12 = 36
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