Problems And Answers PHIMO MOCK 2020 PRIMARY 6

6. A group of students were asked what kind of ball games they usually play. 55 play basketball, 52 play baseball, 48 play volleyball, 30 play basketball and baseball, 16 play basketball and volleyball, 18 play baseball and volleyball and 9 play all three games. If there were 105 students who were asked, how many of them do not play any of the three ball games?

(a) 5
(b) 7
(c) 11
(d) 20

7. Given that \(\sqrt{x^2-16} + \sqrt{2x+y}=0\)
Find the value of \(y-x\)

(a) 8
(b) -8 or 8
(c) -12 or 12
(d) None of the above

8. Find the value of

\(\frac{1}{128}+\frac{1}{64}+\frac{1}{32}+\frac{1}{16}+…+\frac{1}{2}+1+2+4+…+32+64+128 – 255\)

(a) 129/128
(b) 127/128
(c) 128/129
(d) 63/64

9. On a six-sided die, each face is numbered from 1 to 6. What is the probability of throwing a 2 or a 4?

(a) 1/12
(b) 1/6
(c) 1/3
(d) 2/5

10. Find the number of 1×1×1 cubes in the 7th group

(a) 74
(b) 80
(c) 84
(d) 90