Natural numbers - practice problems - page 7 of 94
Number of problems found: 1878
- Five and four
Five divided by four times the number is 0.25. What is that number? - The difference 4
The difference between four times a number and five is the same as three more than twice a number. Find the number. - The difference 6
The difference between a number and 15 is multiplied by -3, and the result is - 30 - The sum 38 The sum of two decimal numbers is four. Their difference is one. What are the numbers?
- Planetary system
Robert has built a mechanical model solar system with three balls representing planets at the end of rods. Each rod is attached to the center, representing the Sun. The planets are lined up when he turns on the motor. The innermost planet makes a revoluti - Distributive property 2
Show with a drawing that 5 × (6 + 2) = 5 × 6 + 5 × 2. What is the name of this property? - Fruits
(I) bought three apples, two oranges, four pears, and five bananas, which in total cost £3.73. (i) I bought twenty-one apples, no oranges, eight pears, and fifteen bananas, which in total cost £7.57. (i) I bought one apple, eighteen oranges, fourteen pear - Of three
Of three positive numbers the product of the first and second is 42, second and third is 56 and that of third and first is 48. Find the third number. - A person 3
A person distributes his pens among four friends A, B, C, and D in the ratio 1/3 : 1/4 : 1/5 : 1/6. What is the minimum number of pens the person should have? - The product 18
The product of two consecutive natural numbers that are multiples of 3 is 810. Find the two numbers. - Four numbers 3
What is the smallest number that must be added to each of the numbers 6, 15, 20, and 43 to make them proportional? - The sum 52
The sum of the digits of a two-digit number is 10. When the digits are interchanged, the resulting number is 54 less than the original. What is the original number? - Human population
The populations of two cities after t years can be modeled by -150t+50,000 and 50t+75,000. What is the difference in the populations of the towns when t=4? - 4th digit Write a digit in place of X so that 85X634 is divisible by 11.
- Series - double GP
In the following series, which number will replace the question mark? 4, 32, 16, 128, 64,? - Fibonacci numbers
If the first three Fibonacci numbers are given as x1 = 1, x2 = 1, and x3 = 2, then what is the least value of n for which x(n) > 500? - A teacher 3
A teacher gives pens and pencils to elementary students at an equal rate in each classroom. Pencils; Pens 18 ; 72 29 ; A 35 ; 140 B ; 168 Determine the unknown value for the letter B. - Multiple numerical bases Find the value of x for which 312four+52x=96ten . Hint: four, x, and ten are the base of the given number.
- Two terms and d
The 8th term of an arithmetic progression is 17 and its 14th term is 29. Find the common difference. - The sum 53
The sum of three numbers in a geometric progression is 35 and their product is 1,000. Find the numbers.
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