Number System If a + b = 16 and ab = 68, what is the value of a² + b² ? 112 116 120 124 112 116 120 124 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP a + b = 16 Therefore, (a+b)² = (16)² = 256 a² + b² + 2ab = 256Therefore, a² + b² = 256 - 2 x 68Therefore, a² + b² = 256 - 136 = 120
Number System Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number 15 4 7.5 5 15 4 7.5 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5
Number System 480% of 350 + 620% of 275 = ? 3385 5385 2385 4385 3385 5385 2385 4385 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 480 x 350/100 + 620 x 275/100= 1680 + 1705 = 3385
Number System (2560 x 1.4) +(7400 x 0.6) =? 8024 7234 9160 6543 8024 7234 9160 6543 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8024
Number System What should come in place of the question mark (?) in the given number series ? 888, 888, 444, 148, ?, 7.4 38 36 37 39 38 36 37 39 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let x be the missing number.Then888/888 = 1,888/444 = 2,444/148 = 3,148/x = 4= x = 148/4 = 37 and 37/7.4 = 5
Number System If 4 2/3 is subtracted form 10 1/2 and the difference is multiplied by 450, then what is the final answer? None of these 2725 2675 2875 None of these 2725 2675 2875 ANSWER DOWNLOAD EXAMIANS APP
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