Number System If x + y = 61 and xy = 888, What is the value of x²+ y² ? 1975 1965 1955 1945 1975 1965 1955 1945 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Because (x + y)² = x² + y² + 2xy∴ x² + y² = (x + y)² - 2xy∴ x² + y² = (61)² - 2 x 888= 3721 - 1776 = 1945
Number System On dividing number by 5, we get 3 as remainder. What will be the remainder when the square of this number is divided by 5? 2 4 1 0 2 4 1 0 ANSWER DOWNLOAD EXAMIANS APP
Number System 4550 ÷ 25% of ? = 130 130 125 140 135 130 125 140 135 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4550 ÷ ? x 25/100 = 130= 4550 ÷ ?/4 = 130= 4550 x 4/? = 130= ? x 130 = 4550 x 4= ? = 4550 x 4/130 = 140
Number System How many figures are required for numbering the pages of a book containing 1000 pages? 3892 2893 2883 6489 3892 2893 2883 6489 ANSWER DOWNLOAD EXAMIANS APP
Number System (444 x 44 x 4) ÷ 40 ? 1953.6 1853.6 2053.6 2153.6 1953.6 1853.6 2053.6 2153.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 444 x 44 x 4/40 = 1953.6
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