Number System How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers? 1092 1192 1082 1200 1092 1192 1082 1200 ANSWER DOWNLOAD EXAMIANS APP
Number System Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number? 240 140 180 160 240 140 180 160 ANSWER DOWNLOAD EXAMIANS APP
Number System If 5/7 of a number is 145, what is 180% of that number ? 355.4 375.4 345.4 365.4 355.4 375.4 345.4 365.4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 5/7 = 145∴ x = 145 x 7/5 = 203Now, 203 x 180/100 = 365.4
Number System How many numbers up to 300 and 700 are divisible by 2, 3 and 7 both together? 9 8 11 10 9 8 11 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (700 – 300)/42 = 9 22/42 => 9 Numbers
Number System If 35% of a number is 899.5, what is 68% of that number ? 1847.6 1547.6 2247.6 1747.6 1847.6 1547.6 2247.6 1747.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Suppose the number is x.Then 35% of x = 899.5∴ 68% of x = 68/35 x 899.5 = 1747.6
Number System The difference between a two-digit number and the number obtained after interchanging its two digits is 36. The sum of the two digits of the number is 12. Find the lowest such possible number. 48 49 47 50 48 49 47 50 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the digits be x and yTherefore, x + y = 12 .............(1)(10y + x) - (10x + y) Therefore, y - x = 4............. (2)Solving (1) and (2), y = 8 Therefore, x = 4There are two possible numbers 48 and 84. So the lowest no. is 48.
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