P6 Competition (MI activities)

If G × H = 108, which of the following is not correct?

• A. 216 must be a common multiple of G and H.

• B. 108 is a multiple of H.

• C. G is a factor of 108.

• D. 108 must be the L.C.M. of G and H.

10 – 15 = ?

• A. 25

• B. 5

• C. 0

• D. -5

If $\frac{n}{3}$ + 15 = 48, then 2n = ?

• A.      99

• B.     189

• C.    198

• D.     378

There are 380 seats in a flight. 5% of them are first class seats and 15% of them are business class seats. The rest are economy class seats. By how many seats are economy class seats more than first class seats and business class seats?

• A. 19 seats

• B. 76 seats

• C. 228 seats

• D. 304 seats

A pizza weighed 3 kg. Andy ate $\frac{5}{8}$ kg, which was half of what Bernice ate. How many kilograms of pizza are left? 

• A.      1 $\frac{1}{8}$  kg

• B.      1 $\frac{1}{4}$  kg

• C.      1 $\frac{7}{8}$  kg

• D.      2 $\frac{1}{8}$  kg

Anakin weighed 40 kg last year, he weighs 5% more this year. Jun weighed 48 kg last year, he weighs 5% less this year. What is the difference between their weights now?

• A. 8.8 kg

• B. 8 kg

• C. 3.6 kg

• D. 4 kg

 $9\ -\ 3\ \div\ \frac{1}{3}\ +\ 1$  

• A.      19

• B.      - 1

• C.      3

• D.     1

A type of bacteria is cultivated in the laboratory, which can split from 1 to 2 per second. At the beginning, there is only 1 bacteria in the incubation box, after a minute, the bacteria will cover the entire box. How long does it take to fill half of the box?

• A. 1 minute

• B. 59 seconds

• C. 30 seconds

• D. 15 seconds

Jim's weight is w kg. His weight is 3 kg less than Howard's. Both of them intend to gain an extra 5 kg each in 3 years. What will be their total weight in 3 years?

• A. (2w + 3) kg

• B. (2w + 33) kg

• C. (2w + 13) kg

• D. (6w + 33) kg

In the figure above, what percentage of the figure is shaded?

• A. 27 $\frac{3}{11}$ %

• B. 25 %

• C. 23 $\frac{1}{13}$ %

• D. $\frac{1}{4}$ %