Fractions and Decimals Find the integer which when decreased by 2 is 80 times the reciprocal of the same number 12 11 13 10 12 11 13 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be X Decreasing 2 from XX - 2 = 80 x (1/X)X^2 - 2X = 80X^2 -2x -80 = 0(X-10)(X+8) = 0x=10,-8X has two values, but among the given options X value should be 10
Fractions and Decimals 3.5 + 21 x 1.3 = ? 26.8 30.8 28.8 24.8 26.8 30.8 28.8 24.8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given Expression = 3.5 + 21 x 1.3 = 3.5 + 27.3 = Given Expression = 3.5 + 21 x 1.3 = 3.5 + 27.3 = 30.8
Fractions and Decimals (44.99)² - (15.01)² = ? 1500 1800 700 1100 1500 1800 700 1100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP a² - b² = (a + b)(a - b)Hence, (44.99)² - (15.01)² = (44.99 + 15.01)(44.99 - 15.01)= 60 x 29.98 = 60 x 30 = 1800
Fractions and Decimals 0.001 / ? = 0.01 0.1 0.001 0.01 None of these 0.1 0.001 0.01 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 0.001 / x = 0.01 Then , x = 0.001 / 0.01 = 0.001 / 0.010= 1 / 10 = 0.1
Fractions and Decimals What decimal of an hour is a second 0.0026 0.0027 0.0025 0.0028 0.0026 0.0027 0.0025 0.0028 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1 / (60 * 60) = 1 / 3600 = .0027
Fractions and Decimals ( 20 + 8 x 0.5 ) / ( 20 - ? ) = 12 20 14 18 16 20 14 18 16 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let (20 + 8 x 0.5) / ( 20 - y) =12Then, 24 =12 x (20 - y)∴ 12y = 216⇒ y = 18
EXAMIANS