Basic operations and concepts - math word problems - page 172 of 320

Number of problems found: 6398

Buffet
At the school, buffet were 30 children. Twenty-one children bought sandwiches, and 15 children bought lemonade. The four children did not buy anything. How many children bought lemonade and sandwiches?
Megapizza
Mega pizza will be divided among 100 people. First gets 1%, 2nd 2% of the remainder, 3rd 3% of the remainder, etc. Last 100th 100% of the remainder. Which person got the biggest portion?
Exponential equation
Find x, if 625^x = 5 The equation is exponential because the unknown is in the exponential power of 625
Domains of functions
F(x)=x²-7x and g(x)=5-x² The domain of (fg)(x) is. ... The domain of (f/g)(x). ..
Trains
Daily passes the same track section 10 pairs of trains with average 2140 passengers. How many people, on average, travel on one train?
Guess number
With what number should be divided, number 10387 to be reduced by 30%?
Smallest 80368
What is the smallest whole number to replace the known x for: 9> x/3> 4.
Remainder 34441
Find the remainder after division when we divide the sum of 1! +2! +3! +. ... . +300! number 13.
Number 3780
25% of the number x equals 2^-1. What is the value of x?
Divisibility
Determine all divisors of a number 91.
Equation - integers
Solve the equation with the unknown x from the field of natural numbers 1+6+11+16+. ... +x=970
Two numbers 14
Two numbers are in the ratio 7:9. If the sum of the numbers is 112, then the larger number is:
HP - harmonic progression
Determine the 8th term of the harmonic progression 2, 4/3, 1,…
Unknown number x
5% from an unknown number equals the number 2⁶. What is the unknown number?
Determine 82975
Determine the sum of all positive odd numbers less than 78
2-3-6-15-42- 62474
A series of numbers was created according to a specific key. Uncover it and fill in the last two missing numbers. 2-3-6-15-42-? -?
Equation: 4197
Solve the equation: (4096^x) · 8! = 161280
Determine 3861
Determine the value of f: 0.49^f = 0.7
Powers 3
2 to the power of n divided by 4 to the power of -3 equals 4. What is the value of n?
Number ratio
Calculate two positive numbers. Its ratio is 6:18, and difference was 372.

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