Natural numbers - practice problems - page 7 of 92
Number of problems found: 1824
- Distributive property 2
Show with a drawing that 5 × (6 + 2) = 5 × 6 + 5 × 2. What is the name of this property? - 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 - 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 that the person should have? - The product 18
The product of two consecutive natural numbers which are multiples of 3 is equal to 810. Find the two numbers. - Four numbers 3
What least number must be added to each of the numbers 6,15,20 and 43 to make them proportional? - 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? - The sum 52
The sum of digits of a two digits number is 10. On interchanging the digit, the number obtained is 54 less than the original number. What is the original number? - Series - double GP
In the following series, which number will replace the question mark? 4, 32, 16, 128, 64,? - 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. - 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? - 4th digit
Write a digit in place of X so that 85X634 is divisible by 11. - 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.
- The sum 53
The sum ofthree numbers of a GP series is 35 and their product is 1000. Find the numbers. - Geometric progression
For the following geometric progression, find the seventh (7th) term: 4, 12, 36, 108, . - Literacy ratio
The town's population is 311250. The ratio of women to men is 43: 40. If 24% of men and 8% of women are literate, then find the total number of literate persons in the town. - Susan 4
Susan went to school for 219 days in a full year. If her attendance is 75%, find the number of days on which the school was open. - The population 3
The population of the town is 126800. It increases by 15% in the first year and decreases by 20% in the second year. What is the population of the town at the end of 2nd year? - Tricky result
Classic adding with percentages: Evaluate 28% of 450 + 45% of 280
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