Natural numbers + reason - practice problems
Number of problems found: 561
- My 4
My 4-digit number is a palindrome; it has a remainder of 21 when you divide it by 100. what is my number? A palindrome is a number that does not change if you write it backward.
- Apples 32
A women sold half part of total apples to the 1st customer. Half part of the remaining to the 2nd customer. Then from rest of the apples she sold half part of it to the third customer and again sold half of the remaining apples to the forth customer. Now
- Multiple and remainder
What is the least multiple of 7, which, when divided by each one of 6,9,15,18, gives the remainder of 4 in each case?
- Same remainder
Find the greatest number that will divide 43, 91, and 183 so as to leave the same the remainder in each case.
- Secondary 5
Secondary Middle School has 1200 students. Each student takes 5 classes a day. Each teacher teaches 4 classes. Each class has 30 students and 1 teacher. How many teachers are there at Secondary Middle School?
- Big school 2
The ratio of the number of boys to the number of girls in a school of 450 pupil is 4 : 5 . When some new boys and girls are admitted, the number of boys increases by 25 and ratio of boys and girls changes to 9 : 13 . Calculate the number of new girls admi
- Remainder one
Find the least number when divided by 2,3,4,5,6, and 7, leaving the remainder as 1 in each case.
- Division with a remainder
Find the least number which when divided by 8, 12, and 20 leaves a remainder of 5 in each case.
- Cows and hens
In a group of cows and hens, the number of legs is 14, more than twice the number of heads. Find the number of cows.
- 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,?
- 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?
- Numbers and digits
How many digits are in the numbers 1 to 100?
- Four-digit number
For a four-digit number abcd, ab: bc = 1:3 and bc: cd = 2:1 (ab, bc, and cd are two-digit numbers from digits a, b, c, d). Find this number(s).
- Contains 66184
Which natural number contains 12 thousand, 15 hundred, 21 tens, and 11 units?
- Signs 40171
Fill in the signs to apply 5 5 5 5 5 = 14
- Classmates
Roman is ranked 12th highest and eleventh lowest pupil. How many classmates does Roman have?
- Expressions 62294
Express the numbers 18, 28, 32, 40, 48, and 200 as numerical expressions composed of exactly five pairs.
- Mystery number
A mystery number is between 800 and 920. No digits are the same. The difference between the numbers is 5. What is the mystery number?
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