Number System Which one of the following is the sum of the numbers 1, 3, 5, 7, 9…. up to nth number? N2 + 1 N(N + 1)/2 N2 N(N + 1) N2 + 1 N(N + 1)/2 N2 N(N + 1) ANSWER DOWNLOAD EXAMIANS APP
Number System A number exceeds by 25 from its 3/8 part. Then the number is? 39 32 35 40 39 32 35 40 ANSWER DOWNLOAD EXAMIANS APP
Number System 65% of 320+?=686 481 480 479 478 481 480 479 478 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 65% of 320+?=686 208+?=686?=686-208?=478
Number System The average age of seven boys sitting in a row facing North is 26 years. If the average age of first three boys is 19 years and the average age of last three boys is 32 years, what is the age of the b 29 years 30 years 28 years 31 years 29 years 30 years 28 years 31 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Age of the fourth boy = (26 x 7 - 3 x 19 - 3 x 32) years = (182 - 57 - 96) years = 29 years
Number System ?125÷5x ?=6265 153 1452 1253 124 153 1452 1253 124 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1253
Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 65 45 55 35 65 45 55 35 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.According to the question,x² - (21)² = 1584= x² - 441 = 1584 = x² = 1584 + 441 = 2025∴ x = √2025 = 45
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