10 Questions

Questions and Answers

- 1.There are 5 people. The first person is 100 cm tall, the subsequent is 20% taller than the person before. What will be the height of the 5th person?
- A.
180 cm

- B.
110 cm

- C.
Between 110 com and 180 cm

- D.
More than 180 cm

- 2.How many two-digit integers are there in which the sum of the digits is equal to 10?
- A.
11

- B.
10

- C.
8

- D.
9

- 3.A wire is wound around a rod. The wire goes exactly 5 times around the rod. The circumference of the rod is 12 cm and the height is 25 cm. What's the length of the wire?
- A.
70

- B.
60

- C.
65

- D.
80

- 4.A taxi company charges $1.75 for the first kilometer and 25 cents for each additional kilometer. What is the maximum distance one can travel with $7?
- A.
21 KM

- B.
22 KM

- C.
16 KM

- D.
17 KM

- 5.How many equilateral triangles can you make using six identical line segments?
- A.
6

- B.
8

- C.
2

- D.
4

- 6.Mary can complete an activity in 40 days. John can complete an activity in 50 days. Estimate for how many days they work on 2 activities if they change them at the best moment?
- A.
46

- B.
45

- C.
45

- D.
44.44

- 7.John had an average of 89 on his three math exams. To earn A he must have an average of 90. What is the lowest grade he must earn on his next exam to raise his average to 90?
- A.
93

- B.
92

- C.
99

- D.
91

- 8.How man "yes" or "no" questions are needed to guess any 5-digit code?
- A.
21

- B.
19

- C.
17

- D.
23

- 9.The average of 99 consecutive numbers is 99. What is t average of the nine smallest of these numbers?
- A.
54

- B.
55

- C.
56

- D.
57

- 10.Water is pumped into an empty swimming pool at a linearly increasing rate, which was zero at the beginning. If the pool is half full in 10 hours, how much extra time is needed to completely fill it?
- A.
About 10 hours

- B.
About 6 hours

- C.
About 4 hours

- D.
About 5 hours