Number System If a + b = 16 and ab = 68, what is the value of a² + b² ? 120 112 116 124 120 112 116 124 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 36% of 850+? % of 592 = 750 75 50 25 12.5 75 50 25 12.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 75
Number System If the sum of one-half of a number exceeds one-third of that number by 7 1/3, the number is: 30 18 20 15 30 18 20 15 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,(1/2 x + 1/5 x) - 1/3 x = 22/311/30 x = 22/3x = 20
Number System 7.8% of 12.5 + 2.5% of 161 = ? 5 9 2 12 5 9 2 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7.8 x 12.5/100 + 2.5 x 161/100= 0.975 + 4.025= 5
Number System Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number? 160 140 180 240 160 140 180 240 ANSWER DOWNLOAD EXAMIANS APP
Number System If A = 1, B = 3, C = 5 and so on, what do the numbers 3, 9, 7 stand for BAT BED CAT CAR BAT BED CAT CAR ANSWER EXPLANATION DOWNLOAD EXAMIANS APP BED
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