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 10 7 8 9 10 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore, x² + (47)² = 2290Therefore, x² = 2290 - 2209 = 81Therefore, x = 9
Number System Sum of square of first number and cube of second number together is 568. Also square of the second number is 15 less than square of 8. What is the value of three-fifth of the first number ? 6 7 9 8 6 7 9 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the first number be x and the second number be y.∴ y² = 82 - 15 = 64 - 15 = 49∴ y = 7∴ x² + 73 = 568= x² + 343 = 568= x² + 568 - 343 = 225∴ x = √225 = 15∴ 15 x 3/5 = 9
Number System Find out the smallest possible number which will be divisible by 1122 as well as 153. 1366 2366 3366 4366 1366 2366 3366 4366 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3366
Number System If the difference between a number and two-fifths of that number is 45 what is the number ? 75 78 76 77 75 78 76 77 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x ∴ x - 2x/5 = 45∴ x = 75
Number System (444 x 44 x 4) ÷ 40 ? 1853.6 1953.6 2153.6 2053.6 1853.6 1953.6 2153.6 2053.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 444 x 44 x 4/40 = 1953.6
Number System (164 x 175) x ? = 258300 2 5 11 9 2 5 11 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 258300 / 164 x 175 = 9
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