Number System If (47)² is added to the square of a number the answer thus obtained is 2290. What is the number ? 8 9 7 10 8 9 7 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore, x² + (47)² = 2290Therefore, x² = 2290 - 2209 = 81Therefore, x = 9
Number System ?125÷5x ?=6265 1452 153 124 1253 1452 153 124 1253 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1253
Number System In how many different ways can the letters of word "SENTENCE" be arranged ? 3360 3260 2360 6460 3360 3260 2360 6460 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 8!/3! 2! = 40320/12 = 3360
Number System What least number shall be added to 4700 to make it a perfect square ? 81 61 91 71 81 61 91 71 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 a number is multiplied by. three-fourth of itself, the value thus obtained is 10800. What is that number ? 120 180 60 260 120 180 60 260 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 3x/4 = 10800= x² = 10800 x 4/3 = 14400∴ x = √14400 = 120
Number System 17580 x 1.8 - 13720 x 2.1 = ? x 2.4 1160 1140 1120 1180 1160 1140 1120 1180 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2.4 x ? = 31644 - 28812 = 2832∴ ? = 2832/2.4= 1180
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