Show:
Original
Easy
Quite easy
Below easy
Far below easy
100

1+3

4

100

5+10x+30

x=4

100

25/2

12

100

231x2

462

100

256x365

93440

200

2+6

8

200

12x3

36

200

90-35

55

200

69+69-31

107

200

485-500+50x10

485

300

12+5

17

300

13x5

65

300

144x2

288

300

100x10

1000

300

45344x2

90688

400

23+23

46

400

Red+yellow

Orange

400

288x2

576

400

444x12

5328

400

0249x10

2490

500

30x2

60

500

Blue+yellow

green

500

18+6x=42

x=4

500

84x7-201

387

500

739x45

33255