Number System Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is: 4 5 10 6 4 5 10 6 ANSWER DOWNLOAD EXAMIANS APP
Number System A number when multiplied by five times of itself give the value equal to 1445. What is the number ? 16 17 15 18 16 17 15 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17
Number System If a + b = 16 and ab = 68, what is the value of a² + b² ? 112 116 124 120 112 116 124 120 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 Supply the missing figure : 2, 6, 12, 20, 30 ... 56 41 42 39 40 41 42 39 40 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 42
Number System What is the value of 8/11 of 5/7 of 96% of 28875 ? 15400 14400 13800 12900 15400 14400 13800 12900 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number = 8 x 5 x 96 x 28875/11 x 7 x 100 = 14400
Number System 75% of 250 - ?% of 380 = 54.5 39 33 31 35 39 33 31 35 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 250 x 75/100 - 380 x ?/100 = 54.5= 250 x 75 - 380 x ?= 54.5 x 100= 18750 - 380 x ?= 5450= 380 x? = 18750 - 5450= 13300= ? = 13300/380 = 35
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