In geometric series number is a combination of number arranged. In example 1) 5, 45, 405, 3645, ? where you need to count them in a one step or two step calculation for obtain the difference common result according with the series of numbers.
At first you can calculate missing number in geometric series and that you place the actual missing number in the ? or missing place. Be prepared when you calculate differences because it is either one or two step calculation. So when you calculate and get result of two difference numbers you need follow some step wise.
For Example:
At first calculate the first number 5 with 9 and second number value we get that is 45 then again second number calculate multiply with 9 and get the third number and follow same steps which is carry up to last and after that you get actual missing number by finding the common value when you put the missing number you have noticed that all series numbers are common 9 which multiply with number and get next number difference.
This kind of missing series calculation you go thorough some common calculation shortcut tricks using cube multiplication division addition cube square shortcut tricks.
In this type series example questions, it is sounds hard, but it really isn’t. Get it? Once you have done this, by practice with more example then you just easily can do in your way as well competitive and as in bank exam also. So, each of our examples are given below.
Geometric Series Tricks:
Examples 1: 5, 45, 405, 3645, ?
Answer: 5 x 9 = 45, 45 x 9 = 405, 405 x 9 = 3645, 3645 x 9 = 32805.
Examples 2: 73205, 6655, 605, 55, ?
Answer: 5 x 11 = 55, 55 x 11 = 605, 605 x 11 = 6655, 6655 x 11 = 73205.
Example 3: 21, 84, 336, ?, 5376
Answer: 21 x 4 = 84, 84 x 4 = 336, 336 x 4 = 1344, 1344 x 4 = 5376
Example 4: 9, 54, ?, 1944, 11664
Answer: 9 x 6 = 54, 54 x 6 = 324, 324 x 6 = 1944, 1944 x 6 = 11664.
Example 5: 5, 35, ?, 1715, 12005,
Answer: 5 x 7 = 35, 35 x 7 = 245, 245 x 7 = 1715, 1715 x 7 = 12005.
Example 6: 25, 100, ?, 1600, 6400
Answer: 25 x 4 = 100, 100 x 4 = 400, 400 x 4 = 1600, 1600 x 4 = 6400.
Example 7: 6, 18, 54, ?, 486, 1458
Answer: 6 x 3 = 18, 18 x 3 = 54, 54 x 3 = 162, 162 x 3 = 486, 486 x 3 = 1458.
Example 8: 15, 30, 60, 120, ?
Answer: 15 x 2 = 30, 30 x 2 = 60, 60 x 2 = 120, 120 x 2 = 240
Example 9: 19, ?, 475, 2375, 11875
Answer: 19 x 5 = 95, 475 x 5 = 2375, 2375×5 = 11875,
Example 10: 3, 48, ?, 768, 3072
Answer: 3 x 4 = 12, 12 x 4 = 48, 48 x 4 = 192, 192 x 4 = 768, 768 x 4 = 3072
At first you can calculate missing number in geometric series and that you place the actual missing number in the ? or missing place. Be prepared when you calculate differences because it is either one or two step calculation. So when you calculate and get result of two difference numbers you need follow some step wise.
For Example:
At first calculate the first number 5 with 9 and second number value we get that is 45 then again second number calculate multiply with 9 and get the third number and follow same steps which is carry up to last and after that you get actual missing number by finding the common value when you put the missing number you have noticed that all series numbers are common 9 which multiply with number and get next number difference.
This kind of missing series calculation you go thorough some common calculation shortcut tricks using cube multiplication division addition cube square shortcut tricks.
In this type series example questions, it is sounds hard, but it really isn’t. Get it? Once you have done this, by practice with more example then you just easily can do in your way as well competitive and as in bank exam also. So, each of our examples are given below.
Geometric Series Tricks:
Examples 1: 5, 45, 405, 3645, ?
Answer: 5 x 9 = 45, 45 x 9 = 405, 405 x 9 = 3645, 3645 x 9 = 32805.
Examples 2: 73205, 6655, 605, 55, ?
Answer: 5 x 11 = 55, 55 x 11 = 605, 605 x 11 = 6655, 6655 x 11 = 73205.
Example 3: 21, 84, 336, ?, 5376
Answer: 21 x 4 = 84, 84 x 4 = 336, 336 x 4 = 1344, 1344 x 4 = 5376
Example 4: 9, 54, ?, 1944, 11664
Answer: 9 x 6 = 54, 54 x 6 = 324, 324 x 6 = 1944, 1944 x 6 = 11664.
Example 5: 5, 35, ?, 1715, 12005,
Answer: 5 x 7 = 35, 35 x 7 = 245, 245 x 7 = 1715, 1715 x 7 = 12005.
Example 6: 25, 100, ?, 1600, 6400
Answer: 25 x 4 = 100, 100 x 4 = 400, 400 x 4 = 1600, 1600 x 4 = 6400.
Example 7: 6, 18, 54, ?, 486, 1458
Answer: 6 x 3 = 18, 18 x 3 = 54, 54 x 3 = 162, 162 x 3 = 486, 486 x 3 = 1458.
Example 8: 15, 30, 60, 120, ?
Answer: 15 x 2 = 30, 30 x 2 = 60, 60 x 2 = 120, 120 x 2 = 240
Example 9: 19, ?, 475, 2375, 11875
Answer: 19 x 5 = 95, 475 x 5 = 2375, 2375×5 = 11875,
Example 10: 3, 48, ?, 768, 3072
Answer: 3 x 4 = 12, 12 x 4 = 48, 48 x 4 = 192, 192 x 4 = 768, 768 x 4 = 3072
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