Number System How many numbers between 300 and 800 can be by using digits 2, 4, 5, 6 and 0 ? 48 36 52 56 48 36 52 56 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∴ Reqd . numbers = 3 x 4P2 = 3 x 12 = 36
Number System Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number? 240 160 140 180 240 160 140 180 ANSWER DOWNLOAD EXAMIANS APP
Number System The average of 7 numbers is 15, that of the first three is 6 and that of the last three is 23. What is the fourth number? 15 7 13 18 15 7 13 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4th No. = (Total of 7 Nos) - (Total of first three + total of last 3) = (15 x 7) - (6 x 3 + 23 x 3) = 105 - (18 + 69) =105 - 87 = 18
Number System A certain number when divided by 39 leaves a remainder 20, what is the remainder when the same number is divided by 13? 11 0 5 7 11 0 5 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 39 + 20 = 59/13 = 7 (Remainder)
Number System If 35% of a number is 899.5, what is 68% of that number ? 2247.6 1747.6 1847.6 1547.6 2247.6 1747.6 1847.6 1547.6 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 9 3/4 + 7 2/17 - 9 1/15 = ? 9 817/1020 9 719/1020 7 817/1020 7 719/1020 9 817/1020 9 719/1020 7 817/1020 7 719/1020 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given sum = 9 + 3/4 + 7 + 2/17 - (9 + 1/15)= (9 + 7 - 9) + (3/4 + 2/17 - 1/15)= 7 + (765 + 120 - 68)/1020 = 7 817/1020
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