Can you add these numbers up in your head?

Question

This must be done in your head only.

Do NOT use paper and pencil or a calculator. Try it.

Take 1000 and add 40 to it. Now add another 1000 . Now add 30. Add another 1000. Now add 20. Now add another 1000.

Now add 10. What is the total?

Answer 1

When I added it in my head, I got the incorrect answer of 5000.

When I added on paper, I got the correct answer of 4100.

I think that I did that because I couldn't accurately depict the mental image of carrying over numbers in my brain. I made an inaccurate calculation because I didn't feel that I needed to allocate more than negligible time to come up with the answer.

In other words, I screwed up.

Answer 2

I merely see numbers. Black numbers on a white historic past for me, in all possibility because this is the way I see them in actual-life ninety 9% of the time - like print on an internet site. For a difficulty like sixteen + 25, I first visualize sixteen + 25 Then I shift 20 around, and visualize 36 + 5 Then I shift the 5 onto the 36, and visualize a 40-one. If a difficulty is composed of the equation of a circle, a parabola or some such, then I visualize a graph with each and every of the proper counsel. In essence, I do the problem in my recommendations an identical way i might do it on paper.

Answer 3

5000

Answer 4

5000

Answer 5

5000

Answer 6

5000

Answer 7

uh oh..i gotta think...i got 4100 lol but for some reason, the number 5000's coming on...but im sticking with 4100 =)

Answer 8

9000

Answer 9

4100

Answer 10

4100