Author: Alex

Do NOT use a calculator!

Nice and easy

Bit more to it

Challenging

55
÷ 5
Double it
+ 5
÷ 9
times by itself
+ 7
Double it
Double it
÷ 8
Answer =

72
4/9 of this
Double it
- 9
4/5 of it
halve it
3/11 of it
+ 9
x 10
50 % of it
Answer =

23
+ 19
5/6 of it
+ 19
÷ 9
multiply by itself
double it
- 24
5/12 of it
5 % of it
Answer =

Nice and easy

Bit more to it

Challenging

55
55 ÷ 5 = 11
11 + 11 = 22
22 + 5 = 27
27 ÷ 9 = 3
3 x 3 = 9
9 + 7 = 16
16 + 16 = 32
32 + 32 = 64
64 ÷ 8 = 8
Answer = 8

72
(4/9) x 72 = 32
32 + 32 = 64
64 - 9 = 55
(4/5) x 55 = 44
44 ÷ 2 = 22
(3/11) x 22 = 6
6 + 9 = 15
15 x 10 = 150
0.5 x 150 = 75
Answer = 75

23
23 + 19 = 42
(5/6) x 42 = 35
35 + 19 = 54
54 ÷ 9 = 6
6 x 6 = 36
36 x 2 = 72
72 - 24 = 48
(5/12) x 48 = 20
5% = 0.05 x 20 = 1
Answer = 1