Problems based on Numbers Test 5

Question : 24 of 40

Marks: +1, -0

When the number

3^98

is divided by 5, the remainder left is:

Solution:

The number

3^78

is divided by 5

3^1=3

3^2=9

3^3=7

3^4=1

3^5=3

The unit digit number repeats itself after the fourth equation

3^{24×4}×3^2=3^2=9

When

9 ÷ 5 = 4

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