Number System If (35)² is added to the square of a number the answer so obtained is 1394. What is the number ? 17 13 15 11 17 13 15 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 What should come in the place of ' ? ' in the following number series ? 2, 5, 9, 19, 37, ? 77 78 75 76 77 78 75 76 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2 x 2 + 1 = 5;5 x 2 - 1 = 99 x 2 + 1 = 19: 19 x 2 - 1 = 3737 x 2 + 1 = 75
Number System A number exceeds by 25 from its 3/8 part. Then the number is? 35 32 40 39 35 32 40 39 ANSWER DOWNLOAD EXAMIANS APP
Number System 5525 ÷ 17 = √? 99225 105625 112225 93025 99225 105625 112225 93025 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √? = 5525/17 = 325∴ ? = (325)² = 105625
Number System (√6 + 1)² = ? + 2√6 6 5 7 8 6 5 7 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (√6 + 1)² - 2√6= (√6)² + 2 x √6 + 1 + 1² - 2√6= 6 + 2√6 + 1 - 2√6 = 6 + 1 = 7
Number System Three seventh of a number is 12 more than 40% of that number. What will be the 60% of that number? 210 126 148 248 210 126 148 248 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3/7 x – 40/100 x = 12x = 35 * 1235 * 12 * 60/100 = 252/2 = 126
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