20 + 30x0 + 1 =?

21

20 + 30x0 + 1 =?

21

A + A + A = 120

D + C = 35

C = ?

25

10 + 10x0 + 20x1 + 5x0+ 3

¿Can you solve this?

23

11 x 11 = 4

22 x 22 = 16

33 x 33 =?

36 (1+1) x (1+1) = 4 (2+2) x (2+2) = 16 (3+3) x (3+3) = 36

6 ÷ 2 (1 + 2) =?

9

6 ÷ 2 = 3, 1 + 2 = 3

3 (3) = 9

How old am I?

18 years old

2 + 2 (2 + 2 x 0) + 2x0 = ?

A) 8 B) 6 C) 2 D) 0

Option B) 2 + 2 x 2 = 2 + 4 = 6

how old Mary will have?

57

How many people were on the train to begin with?

70 people

3^2=4+5

(Note ^ refers to the power symbol)

What percentage at least must have studied all 4?

10%

70

75

85

+ 80

310 ÷ 3 = 100 remainder 10

The first 56 balls could be of all colours except red. This would leave 8 balls, all of which are red, so any three chosen would be red.