1. Brain Trainer
Follow the instructions from the top, starting with the number given to reach an answer at the bottom in 30 seconds.
There are three levels, easy, medium and hard, choose the one most suitable for you.

2. 48 97 375 72 361 185 Brain Trainer  3 double it 2/5 of it + 6 - 18
EASY 97
MEDIUM
375
HARD
 3
double it
2/5 of it
+ 6
- 18
80% of it
 5
25% of it
+ 1/10 of it
+ 34
7/11 of it
 12
 4
 9
times itself
+ 9
 4
+ 200% of it
- 13
+ 13
- 178
times itself
 4
- 1/5 of it
½ of it
times itself
+ ¼ of it
ANSWER 72
361
ANSWER
ANSWER
185

3. 13 41 98 80 5 13 Brain Trainer + 7  5 + 27  5 - 22 double it  11
EASY 41
MEDIUM 98
HARD
+ 7
 5
+ 27
 5
- 22
double it
 11
 3
- 163
- 13
+ 4
treble it
double it
 13
+ 9
+ 15
cube it
 6
 7
- 80
+ 3/5 of it
- 3
+ 15
+ ¼ of it
 10
 12
- 77
ANSWER 80
ANSWER 5 13
ANSWER

4. 42 30 87 5 44 112 Brain Trainer ÷ 7 + ½ of it + 128 treble it
EASY 30
MEDIUM 87
HARD
÷ 7
+ ½ of it
+ 128
treble it
double it
÷ 5
+ 22
 15
treble it
 4
square it
- 14
÷ 10
+ 54
+ 3/5 of it
- 5
+ ½ of it
half of it
 8
- 5
+ 328
+12
÷ 10
÷ 6
÷ 20
+ 31
+ 3/5 of it 5
ANSWER 44
ANSWER
ANSWER
112

5. 19 82 135 7 116 74 Brain Trainer +17 double it 4/5 of it ÷ 6 - 57 - 28
EASY 82
MEDIUM
135
HARD
+17
double it
4/5 of it
÷ 6
- 57
- 28
 11
double it
 6
- 13
+ 36
¾ of it
+ 24
3/5 of it
 18
÷ 7
 3
+ 91
 4
 9
treble it
½ of it
- 21
+ 1/9 of it
- 15
 4
 5 7
ANSWER
116
ANSWER
ANSWER 74

6. 4 21 55 33 8 125 Brain Trainer double it  6 treble it  7 + 138
EASY 21
MEDIUM 55
HARD
double it
 6
treble it
 7
+ 138
- 2/5 of it
+ 43
1/4 of it
÷ 9
÷ 9
÷ 11
square it
- 5
+ 75
+ 219
÷ 7
+ 1/3 of it
¾ of it
square it
- 18
-190
1/3 of it
 15
÷ 13
 11
+ 1/3 of it
cube it 33
ANSWER 8
ANSWER
ANSWER
125

7. 7 29 61 28 3 40 Brain Trainer + 11 - 5 treble it double it ÷ 4 + 15
EASY 29
MEDIUM 61
HARD
+ 11
- 5
treble it
double it
÷ 4
+ 15
÷ 4
+ 75
÷ 9
- 3
1/3 of it
double it
 10
+ 1/3 of it
- 9
- 5
double it
+ 2/5 of it
÷ 11
+ 48
+ 76
+ 9
- 99
÷ 5
double it
÷ 7
+ 3/5 of it 28
ANSWER 3
ANSWER
ANSWER 40

8. 4 55 81 24 260 154 Brain Trainer  5 double it 1/3 of it ½ of it + 29
EASY 55
MEDIUM 81
HARD
 5
double it
1/3 of it
½ of it
+ 29
+ 121
square it
double it
+ ½ of it
- 75
- 38
 4
+ 7
÷ 4
1/3 of it
÷ 4
treble it
- 137
½ of it
÷ 9
2/3 of it
 9
+ 32
double it
- 12
 5
- 58 24
ANSWER
260
ANSWER
ANSWER
154

9. 48 22 9 10 62 770 Brain Trainer ÷ 8 + ½ of it square it + 15 treble it
EASY 22
MEDIUM 9
HARD
÷ 8
+ ½ of it
square it
+ 15
treble it
+ 179
÷ 7
- 48
÷ 13
square it
1/3 of it
+ 4/5 of it
- 4
+ 59
double it
 8
½ of it
7/8 of it
+ 25
treble it
- 34
double it
- 83
treble it
÷ 13
double it
+683 10
ANSWER 62
ANSWER
ANSWER
770

10. Brain Trainer
The end.