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प्रश्न
Find the unit digit of the following numeric expression.
11420 + 11521 + 11622
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उत्तर
11420 + 11521 + 11622
In 11420 unit digit of base 114 is 4 and power is 20 ...(even power)
∴ Unit digit of 11420 is 6
In 11521 unit digit of base 115 is 5 and power is 21 ...(Positive Integer)
∴ Unit digit of 11521 is 5
In 11622 unit digit of base 116 is 6 and power is 22 ...(Positive Integer)
∴ Unit digit of 11622 is 6
∴ Unit digit of 11420 + 11521 + 11622 can be obtained by adding 6 + 5 + 6 = 17
Unit digit of 11420 + 11521 + 11622 is 7
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संबंधित प्रश्न
When the unit digit of the base and its expanded form of that number is 9, then the exponent must be ____________ power.
Match the following:
| Group A Exponential form |
Group B Unit digit of the number |
| (i) 2010 | (a) 6 |
| (ii) 12111 | (b) 4 |
| (iii) 44441 | (c) 0 |
| (iv) 25100 | (d) 1 |
| (v) 71683 | (e) 9 |
| (vi) 729725 | (f) 5 |
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