Number System 4.78% of 1255 + 3.24% of 440=0.5% of ? 14849 12849 13849 11849 14849 12849 13849 11849 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 0.5 x ?/100 = 4.78 x 1255/100 + 3.24 x 440/100= 59.989 + 14.256∴ ? = 74.245 x 100/0.5 = 14849
Number System The difference between the two digit number and the number obtained by interchanging its digits is 54. The difference between the digits is? 1 Nothing can be said. 6 4 1 Nothing can be said. 6 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) – (10y + x) = 54x – y = 6
Number System In a division sum, the quotient is 120, the divisor 456 and the remainder 333, find the dividend? 55053 50553 56053 5553 55053 50553 56053 5553 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 120 * 456 + 333 = 55053
Number System If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ? 179 124 163 146 179 124 163 146 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² - (83)² = 8487x² = 8487 + (83)²x² = 8487 + 6889x² = 15376Therefore, x² = 15376 x = 124
Number System (√6 + 1)² = ? + 2√6 5 8 6 7 5 8 6 7 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
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