Number System What is the sum of all the prime numbers from 20 to 40? 119 120 118 117 119 120 118 117 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 23 + 29 + 31 + 37 = 120
Number System In how many different ways can the letters of the word 'FRUGAL'be arranged ? 515 556 720 660 515 556 720 660 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In FRUGAL there ae six difference letters Therefore, 6 ! = 6 x 5 x 4 x 3 x 2 x 1 = 720
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.20 Rs.30 Rs.40 Rs.25 Rs.20 Rs.30 Rs.40 ANSWER DOWNLOAD EXAMIANS APP
Number System What is the sum of all the composite numbers up to 20? 130 131 128 132 130 131 128 132 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 = 132
Number System Which one of the following represents the sum of the first n even numbers? N(N – 1) N(N + 1) N2 N2+ 1 N(N – 1) N(N + 1) N2 N2+ 1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
Number System What number should come in the place of (?) in the following number series ? 1, 4, 9, 25, 49, ?, 169, 289, 361 225 11 121 321 225 11 121 321 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The series is (Prime No.)²So it is (11)² = 121
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