Numbers - practice for 9 year olds
Number of problems found: 100
- Library 4
Library A has a total collection of 250 books. Library B has 100 more books than Library A, and Library C has twice as many books as the combined number of books in Library A and B. What is the total number of books in libraries A, B and C? - Angel 4
Angel bought 11 spools of wire. Each spool has 2.8 meters of wire. How many meters of wire did Angel buy in all? - Lucas
Lucas is trying to find 6×15. He knows that 3×15=45. He also knows that 6=2×3. How can Lucas use 3×15 to help him find 6×15? - Dividend, divisor and quotient
Hiba got the answer of 72 after dividing two numbers. If the divisor was 14, what was the dividend?
- Pants
Peter bought 58 pairs of pants, 18 of which were torn. How many pants were not torn, which he had? - Divide 37
Divide 2406 cherries equally among 3 children. How many each got? - Arithmetic progressions.
Find the sum of all the numbers between 9 and 204, which is exactly divisible by 3. - Locker combination
Todd forgot the first two numbers of his locker combination. The numbers can be any number 1 through 6. What is the probability that he will guess the first number correctly and the second number incorrectly? - 52 cards
A hand of five cards is dealt from a pack of 52 playing cards. How many different hands can be dealt that contain three aces?
- Two-digit 7256
Write how many two-digit numbers have the sum of the digits 6? - Unknown number 22
I am a two-digit number. My tens digits are 4. My one digit is three more than my tens. Who am I? - Numbers 4387
Write numbers from 0 to 100 with the same number of units and tens. - Beginning 3953
Jano and Petr exchange stamps. Jano gave Peter 32 stamps with rockets for 8 stamps with turtles. How was Jano after this exchange? Did he have more or fewer marks than at the beginning? Explain your answer. - Student's 4287
Dorka had a total of 22 marks in her student book. She had three times less than three ones. She had only two doubles. How many units did Dorka have in the student's book, and how many threes?
- Diala
Diala bought some books in 2012, and then during 2013, she bought 3 times as many books as she bought in 2012. Diala bought 48 books during these two years. Make a diagram to represent the given. How many books did Diala buy each year? - Small painters
There are ten pupils in the painting group. Eight pupils paint with watercolors, and nine pupils with tempera colors. How many pupils paint both water and tempera colors when each pupil paints? - Wafers
They used 200 pieces to make wafers. One hundred fifty-seven topped with caramel topping and 100 with sugar topping. How many wafers did both toppings have? - Number pattern
What are the following two numbers that occur in this pattern? 0.24, 0.48, 0.96, 1.92, ____, ____ - Four-digit 63154
In entry 85 * 0, replace the asterisk with a number to give the smallest possible four-digit number divisible by 4.
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