Presentation for a quiz between two teams in order to review percentages. Secondary School Maths.

1. %
%
You will be divided into two teams:
TEAM A and TEAM B.
Each team must work together to solve the
following equations about percentage
before the time runs out!

2. Calculate the percentage in your
head. You have 15 seconds for each
question.
TEAM A is up first.
Ready… Set… GO!!!

3. TEAM A:
1% of 450

4. TEAM A:
1% of 450
Time’s Up!

5. TEAM A:
1% of 450
is 4.5

6. Now, TEAM B takes a
turn.
Ready… Set… GO!!!

7. TEAM B:
10% of 27

8. TEAM B:
10% of 27
Time’s Up!

9. TEAM B:
10% of 27
is 2.7

10. TEAM A:
10% of 165

11. TEAM A:
10% of 165
Time’s Up!

12. TEAM A:
10% of 165
is 16.5

13. TEAM B:
50% of 30

14. TEAM B:
50% of 30
Time’s Up!

15. TEAM B:
50% of 30
is 15

16. TEAM A:
25% of 40

17. TEAM A:
25% of 40
Time’s Up!

18. TEAM A:
25% of 40
is 16.5

19. TEAM B:
50% of 2.2

20. TEAM B:
50% of 2.2
Time’s Up!

21. TEAM B:
50% of 2.2
is 1.1

22. TEAM A:
25% of 10

23. TEAM A:
25% of 10
Time’s Up!

24. TEAM A:
25% of 10
is 2.5

25. TEAM B:
1% of 5

26. TEAM B:
1% of 5
Time’s Up!

27. TEAM B:
1% of 5
is .05

28. TEAM A:
50% of 250

29. TEAM A:
50% of 250
Time’s Up!

30. TEAM A:
50% of 250
is 125

31. TEAM B:
10% of 820

32. TEAM B:
10% of 820
Time’s Up!

33. TEAM B:
10% of 820
is .05

34. TEAM A:
1% of 21.5

35. TEAM A:
1% of 21.5
Time’s Up!

36. TEAM A:
1% of 21.5
is .215

37. TEAM B:
100% of 14

38. TEAM B:
100% of 14
Time’s Up!

39. TEAM B:
100% of 14
is 14

40. Find the value of the missing
number n in each equation. You will
have 30 seconds for each question.
TEAM A is up first.

41. TEAM A:
50% of n is 8.

42. TEAM A:
50% of n is 8.
Time’s Up!

43. TEAM A:
50% of n is 8.
n = 16

44. TEAM B:
15% of n is 7.5

45. TEAM B:
15% of n is 7.5
Time’s Up!

46. TEAM B:
15% of n is 7.5
n = 50

47. TEAM A:
7% of n is 8.75

48. TEAM A:
7% of n is 8.75
Time’s Up!

49. TEAM A:
7% of n is 8.75
n = 125

50. TEAM B:
120% of n is 96

51. TEAM B:
120% of n is 96
Time’s Up!

52. TEAM B:
120% of n is 96
n = 80

53. TEAM A:
4.5% of n is 112.5

54. TEAM A:
4.5% of n is 112.5
Time’s Up!

55. TEAM A:
4.5% of n is 112.5
n = 2500

56. TEAM B:
35.8% of n is 71.6

57. TEAM B:
35.8% of n is 71.6
Time’s Up!

58. TEAM B:
35.8% of n is 71.6
n = 200

59. Calculate the percentage in your
head. You have 15 seconds for each
one.
TEAM A is up!

60. TEAM A:
10% of 1250

61. TEAM A:
10% of 1250
Time’s Up!

62. TEAM A:
10% of 1250
is 125

63. TEAM B:
25% of 88

64. TEAM B:
25% of 88
Time’s Up!

65. TEAM B:
25% of 88
is 22

66. TEAM A:
20% of 400

67. TEAM A:
20% of 400
Time’s Up!

68. TEAM A:
20% of 400
is 80

69. TEAM B:
15% of 300

70. TEAM B:
15% of 300
Time’s Up!

71. TEAM B:
15% of 300
is 45

72. TEAM A:
75% of 2000

73. TEAM A:
75% of 2000
Time’s Up!

74. TEAM A:
75% of 2000
is 1500

75. TEAM B:
30% of 60

76. TEAM B:
30% of 60
Time’s Up!

77. TEAM B:
30% of 60
is 18

78. You have 30 seconds to solve the
following word problems.

79. TEAM A:
20% of a quantity
is 40. What is the
quantity?

80. TEAM A:
Time’s Up!

81. TEAM A:
20% of a quantity
is 40. What is the
quantity?
The quantity is
200.

82. TEAM B:
10% of a number
is 35. What is the
number?

83. TEAM B:
Time’s Up!

84. TEAM B:
10% of a number
is 35. What is the
number?
The number is
350.

85. Solve the following equations in your
head. This time you only have 10
seconds!

86. TEAM A:
50% of 220

87. TEAM A:
50% of 220
Time’s Up!

88. TEAM A:
50% of 220
is 110

89. TEAM B:
50% of 82

90. TEAM B:
50% of 82
Time’s Up!

91. TEAM B:
50% of 82
is 41

92. TEAM A:
25% of 800

93. TEAM A:
25% of 800
Time’s Up!

94. TEAM A:
25% of 800
is 200

95. TEAM B:
25% of 60

96. TEAM B:
25% of 60
Time’s Up!

97. TEAM B:
25% of 60
is 15

98. TEAM A:
25% of 280

99. TEAM A:
25% of 280
Time’s Up!

100. TEAM A:
25% of 280
is 70

101. TEAM B:
50% of 4600

102. TEAM B:
50% of 4600
Time’s Up!

103. TEAM B:
50% of 4600
is 2300

104. TEAM A:
50% of 12

105. TEAM A:
50% of 12
Time’s Up!

106. TEAM A:
50% of 12
is 6

107. TEAM B:
75% of 800

108. TEAM B:
75% of 800
Time’s Up!

109. TEAM B:
75% of 800
is 600

110. TEAM A:
75% of 280

111. TEAM A:
75% of 280
Time’s Up!

112. TEAM A:
75% of 280
is 210

113. TEAM B:
75% of 60

114. TEAM B:
75% of 60
Time’s Up!

115. TEAM B:
75% of 60
is 45

116. Find the value of the missing
number x in each equation. You will
have 20 seconds for each question.

117. TEAM A:
50% of x is 150.

118. TEAM A:
50% of x is 150.
Time’s Up!

119. TEAM A:
50% of x is 150.
x = 300

120. TEAM B:
25% of x is 120

121. TEAM B:
25% of x is 120
Time’s Up!

122. TEAM B:
25% of x is 120
x = 480

123. TEAM A:
75% of x is 150.

124. TEAM A:
75% of x is 150.
Time’s Up!

125. TEAM A:
75% of x is 150.
x = 200

126. TEAM B:
50% of x is 7

127. TEAM B:
50% of x is 7
Time’s Up!

128. TEAM B:
50% of x is 7
x = 14

129. TEAM A:
25% of x is 6.

130. TEAM A:
25% of x is 6.
Time’s Up!

131. TEAM A:
25% of x is 6.
x = 24

132. TEAM B:
75% of x is 9

133. TEAM B:
75% of x is 9
Time’s Up!

134. TEAM B:
75% of x is 9
x = 12

135. TEAM A:
10% of x is 31.

136. TEAM A:
10% of x is 31.
Time’s Up!

137. TEAM A:
10% of x is 31.
x = 310

138. TEAM B:
20% of x is 18

139. TEAM B:
20% of x is 18
Time’s Up!

140. TEAM B:
20% of x is 18
x = 90

141. TEAM A:
5% of x is 35.

142. TEAM A:
5% of x is 35.
Time’s Up!

143. TEAM A:
5% of x is 35.
x = 700

144. TEAM B:
10% of x is 4

145. TEAM B:
10% of x is 4
Time’s Up!

146. TEAM B:
10% of x is 4
x = 40

147. TEAM A:
20% of x is 86.

148. TEAM A:
20% of x is 86.
Time’s Up!

149. TEAM A:
20% of x is 86.
x = 430

150. TEAM B:
5% of x is 2

151. TEAM B:
5% of x is 2
Time’s Up!

152. TEAM B:
5% of x is 2
x = 40