Number System A man engaged a servant on the condition that he would pay him Rs.710 and a uniform after a year service. He served only for 8 months and got Rs.460 and a uniform. Find the price of the uniform? Rs.25 Rs.40 Rs.20 Rs.30 Rs.25 Rs.40 Rs.20 Rs.30 ANSWER DOWNLOAD EXAMIANS APP
Number System √207.36 = ? 15.7 12.3 16.7 14.4 15.7 12.3 16.7 14.4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √207.36 = √20736/√100 = 144/10 = 14.4
Number System If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ? 50 47 48 49 50 47 48 49 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48
Number System If A + B = 30 and AB = 94, What is the value of A² + B² ? 625 712 824 920 625 712 824 920 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94 = 900 - 188 = 712
Number System If (35)² is added to the square of a number the answer so obtained is 1394. What is the number ? 13 17 11 15 13 17 11 15 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² + (35)² = 1394Therefore, x² = 1394 - (35)² = 1394 - 1225 = 169Therefore, x = √169 = 13
Number System What is the sum of all the prime numbers from 20 to 40? 119 117 120 118 119 117 120 118 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 23 + 29 + 31 + 37 = 120
EXAMIANS