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Everyday Math Demystified

1

12

14

18

24

12 kids. 6 kids had juice and cake, leaving 2 out of the cake eaters that didn’t have juice. As there were 10 juicers.

2

82

80

84

86

82+84 = 166 and 80+86 = 166, Since 82 & 84 are consecutive even numbers, so 82 is the smallest number.

3

105

100

115

90

The bottle costs 105 cents, and the cork costs 5 cents.

4

6,457

5,764

6,745

7,645

The last digit is moved to the front to make the next number.

5

2 + 4 × 6 - 8

2 + 4 + 6 + 8

2 × 4 - 6 +4

2 × 4 × 6 ÷ 8

2 + 4 × 6 - 8 = 28

6

19

16

32

35

32+19=51 and 32-19=13 so smallest number is 19

7

37

23

29

91

(6X5)+12-5=37

8

24 feet

27 feet

270 feet

30 feet

Since there are eight intervals, the distance between the first and last one is 8 × 3 = 24 feet.

9

7

4

8

9

7 cuts are required to cut a log into 7 pieces.

10

15.12

0.78

151.2

85.42

42% × 36 = 0.42 x 36 = 15.12