Quizzes & Puzzles2 mins ago
Daily Mail Mindbender Question 1 Friday 4Th April 2014
5 Answers
Julie baked three fewer cupcakes than Steph, who made three times as many as Richard, who baked 15% as many as Jess. If they averaged 30 cupcakes each, how many did Steph bake?
The answer is 27 cupcakes. Can someone tell me out to arrive at this answer?
The answer is 27 cupcakes. Can someone tell me out to arrive at this answer?
Answers
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So:
Julie = S-3
Richard = S/3
Jess = S/3*20/3 = 20s/9
S = 120 - (S-3 + S/3 + 20s/9)
S = 123 - (S + S/3 + 20/9)
conver all fractions into 9ths
S = 123 - (9s + 3s/9 + 20/9)
S = 123 - (32s/9)
add 32s/9 to both sides
S + 32s/9 = 123
41s/9 = 123
41s = 123*9
41s = 1107
Divide both sides by 41 =
S = 27.
So:
Julie = S-3
Richard = S/3
Jess = S/3*20/3 = 20s/9
S = 120 - (S-3 + S/3 + 20s/9)
S = 123 - (S + S/3 + 20/9)
conver all fractions into 9ths
S = 123 - (9s + 3s/9 + 20/9)
S = 123 - (32s/9)
add 32s/9 to both sides
S + 32s/9 = 123
41s/9 = 123
41s = 123*9
41s = 1107
Divide both sides by 41 =
S = 27.
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