1, add the numbers in sequence.

In the following order, the next number should be?

2、5、 14、4 1

Answer: 122 (*3- 1)

2. Guess mathematical terms

1 .8 knives. 2. Car print. 3. look forward to each other. 4. Manual calculation. 5. midway. 6. Audit the accounts. 7. detour. 8. Bye, Mom.

9. Five cents. 10, almost. 1 1, member. 12, the number of moves. 13, no change. 14, lost contact.

15, move forward side by side. 16, see you at the usual place. 17, the doctor raised his pen. 18,54321.19, each as much.

20. Don't cheat in the exam.

answer

1. decomposition. 2. Trajectory. 3. Equality. 4. Index. 5. radius. 6.logarithm. 7. curve. 8. Denominator. 9. Half angle

10, similar. 1 1, the center of the circle. 12, operation. 13, integer. 14, line segment (broken). 15, parallel. 16, origin.

17, prescription. 18, countdown. 19, average. 20. Real score.