Students at cinema

All pupils from the school went to the cinema for a film performance. The cinema has 400 seats, 2 rows of 20 seats remain unoccupied. 10 places were occupied by teachers. How many students were there?

Result

n =  350

Solution: Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...): Be the first to comment! Next similar math problems:

1. Flood water Flood waters in some US village meant that the homes had to evacuate 364 people. 50 of them stayed at elementary schools, 59 them slept with their friends and others went to relatives. How many people have gone to relatives?
2. Expression 1 What is 7+8-(5×2)+5-4+(6×(5-3)+6)-(8+10)-7+6?
3. What is missing (1000) What number is to add to get 1000?
4. Decimal expansion Calculate: 2 . 1 + 0 . 10 + 7 . 10000 + 4 . 1000 + 6 . 100 + 0 . 100000 =
5. Roman numerals 2+ Add up the number writtens in Roman numerals. Write the results as a roman numbers.
6. Addition of Roman numbers Added together and write as decimal number: LXVII + MLXIV
7. Product Result of the product of the numbers 1, 2, 3, 1, 2, 0 is:
8. Subtraction Test what do you know about the subtraction of two numbers: a) make a difference if the minuend 4,307,288 and subtrahend is 472008 b) minuend is 4000 more than subtrahend. What's the difference? c) the difference is 38900 less than the minuend. What is th
9. Write decimals Write in the decimal system the short and advanced form of these numbers: a) four thousand seventy-nine b) five hundred and one thousand six hundred and ten c) nine million twenty-six
10. Summand One of the summands is 145. The second is 10 more. Determine the sum of the summands.
11. Operations Sum of the numbers 1.01 and 3.35 multiply by the difference of numbers 6.69 and 1.39.
12. Voting 400 employees cast their votes in a board member election that has only 2 candidates. 120 people vote for candidate A, while half of the remaining voters abstain. How many votes does candidate B receive?
13. Roman numerals 2- Subtract up the number written in Roman numerals. Write the results as Roman numbers.
14. Roman numerals + Add up the number writtens in Roman numerals. Write the results as a decimal number.
15. Roman numerals Write numbers written in Roman numerals as decimal.
16. With bracket Calculate (evaluate) simple mathematical expression with a negative numbers and a bracket: 13+15*5-2*(-6)
17. Product of the sum and difference Calculate the product of the sum and difference of numbers -7 and -2.