Genuinely curious
Thursday, 13 Mar 2025
Exclusive insights, data, and analysis for financial market experts.
Search
Have an existing account?
Sign In
“60 pluusss (checks memory) 15, 75”
(20 + 40) + (7 + 8)
48 + 7 = 55
55 + 20 = 75
48 + 2 = 50
27 – 2 = 25
50 + 25 = 75
I do 48+20 =68, then 68+7 =75
7+8=15,
20+40=60,
60+15=75
My autism magically projects 75 into my brain
Tetris
60 + 7 + 8 Â Â Â
60 + 15 Â Â Â
75
1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1=75
27+3 + 48-3 = 30 + 45
30+50-5
48 + 2 + 27 – 2 = 50 + 25 + 75
7+8=15
20+40+15=75
27 + 50 – 2
27 is multiple of 9 so
27/9=3
4+3=7, 8-3=5 —> 75
This trick has limited usage
7 + 8 = 15, carry the 1, 1 + 2 = 3 + 4 = 7, 75.
27 + 48 = 30 + 45 = 75..?
20+40=60
7+8=15 (my mental math for this kind of thing: 8+2=10 and 7-2=5, so 10+5=15)
60+15=75
Move 2 from 27 to 48 to get 25 + 50.
27 + 8 =35
35 + 40=75
I convert both into base 100 then add them
3(9+16) or it ends with 5 and it’s a multiple of 3 so it’s gotta be 75
48+7=55
55+20=75
24+48+3 = 72 + 3 = 75
Round up to 30+50=80 then subtract 5
6 uuuhh 75
20 + 40 + 7 + 3 + 5
– 27 + 48
– = (20 + 40) + (7 + 8)
– = 60 + 15
– = 75
I know that 8+7 is 15, so I know it ends in 5. Then I just add ten to the sum of the tens digits and get 70. So it’s 75.
8-10 = 2
7-2 = 5
Put a 1 in front of the 5 making it 15
20+40 = 60
60+15 =75
7 + 8 = 8 + 8 – 1 = 15
Leave the 5, carry the 1.
1 + 4 + 2 = 7
75.