33 Primary 5 pupils and 29 of Primary 6 pupils went on a school excursion. The number of Primary 6 boys was 5 times the number of Primary 5 boys, and there were 16 more Primary 5 girls than Primary 6 girls. How many more Primary 6 boys than Primary 6 girls went on the school excursion?

Primary 5		Primary 6
33		29
Boys	Girls	Boys	Girls
1 u	1 p + 16	5  u	1 p

Total number of pupils in Primary 5 = 1 u + 1 p + 16

1 u + 1 p + 16 = 33
1 u + 1 p = 33 - 16
1 u + 1 p = 17 --- (1)

Total number of pupils in Primary 6 = 5 u + 1 p

5 u + 1 p = 29 --- (2)

(2) - (1)
(5 u + 1 p) - (1 u + 1 p) = 29 - 17
5 u - 1 u = 12
4 u = 12

1 u = 12 ÷ 4 = 3

Number of boys in Primary 6
= 5 u
= 5 x 3
= 15

Number of girls in Primary 6
= 1 p
= 29 - 5 u
= 29 - 15
= 14

Number of more boys than girls in Primary 6
= 15 - 14
= 1

Answer(s): 1