Choose a number and add 5 to it. Multiply it by 2. Subtract by 7 and add 1. Divide by 2. Subtract 2. Will you get your starting number every time?

Question

Sonia Mendez

Mathematics

25 August, 04:48

Choose a number and add 5 to it. Multiply it by 2. Subtract by 7 and add 1. Divide by 2. Subtract 2. Will you get your starting number every time?

+2

Answers (1)

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Taylor Hanson · Answer 1

8+5=13

13*2=26

26-7=19

19+1=20

20/2=10

10-2=8

100+5=105

105*2=210

210-7=203

203+1=204

204/2=102

102-2=100

4256+5=4261

4261*2=8522

8522-7=8515

8515+1=8516

8516/2=4258

4258-2=4256

Yes, I tested it 3 times with 3 different numbers.