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Question

What is the value of x in the equation 1+121762401=1+x7?

A
0
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B
1
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C
2
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D
3
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Solution

The correct option is B 1
 1+ 121762401=1+x7
1+240121762401=1+x7
1+2252401=1+x7
 1+2252401=1+x7
 1+1549=1+x7
6449=1+x7
87=1+x7
x7=871
x7=17
x=17×7
x=1

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