Cube using Column Method
Cube using Column Method
Let x = ab (where a is the tens digit and b is the units digit ) be a two-digit natural number.
Recall that for finding ,we formed three columns containing
,
, because
Since =
+3
+ 3
+
.
Therefore, for finding we will form four columns containing
,
b,3
a
and
.
The remaining procedure is exactly identical to the method of finding the square of a two-digit natural number.
Illustration: Find the cube of 24 by using the column method .
Solution: Here, a = 2 and b = 4 .
|
Column I |
Column II 3 |
Column III 3 |
Column IV |
|
+5 |
3 +10 |
3 +6 |
|
| 13 | 58 | 102 |
13 8 2 4
Illustration: Find the cube of 25 by using the column method.
Solution: Here, a = 2 and b = 5 .
|
Column I |
Column II 3 |
Column III 3 |
Column IV |
|
+7 |
+16 |
+12 |
|
| 15 | 76 | 162 |
15 6 2 5
The value of | |||
| Right Option : B | |||
| View Explanation | |||
Find the number obtained in the third column while calculating the cube of 55 using the column method. | |||
| Right Option : D | |||
| View Explanation | |||
Find the number obtained in the second column while calculating the cube of 99 using the column method. | |||
| Right Option : C | |||
| View Explanation | |||
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7thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
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