Number System What is the sum of all the composite numbers up to 20? 131 132 128 130 131 132 128 130 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 = 132
Number System ?2704 x ?2209=? 1444 2444 3444 4444 1444 2444 3444 4444 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2444
Number System If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ? 49 47 50 48 49 47 50 48 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48
Number System How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers? 1192 1200 1082 1092 1192 1200 1082 1092 ANSWER DOWNLOAD EXAMIANS APP
Number System In how many different ways can the letters of the word TEST' be arranged ? 16 10 8 12 16 10 8 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The word TEST consists of 4 letters in which T comes twice ∴ Number of arrangements= 4!/2! = 4 x 3 x 2 x 1/2 x 1 = 12
Number System A plot of 650 sq ft is available at the rate of Rs 6500 per sq ft. If 13% of the total cost of the plot is to be paid for booking the plot, what is the booking amount, (in Rs) ? Rs. 549250 Rs. 536250 Rs. 519850 Rs. 507250 Rs. 549250 Rs. 536250 Rs. 519850 Rs. 507250 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total cost of plot= 650 x 6500 = 4225000Booking amount = 13% of (4225000) = 4225000 x 13/100 = 549250
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