Sum of the digits
How many are two-digit natural numbers that have the sum of the digits 9?
Thank you for submitting an example text correction or rephasing. We will review the example in a short time and work on the publish it.
Please write to us with your comment on the math problem or ask something. Thank you for helping each other - students, teachers, parents, and problem authors.
Showing 0 comments:
You need to know the following knowledge to solve this word math problem:
Next similar math problems:
How many odd four-digit numbers can we create from digits: 0, 3,5,6,7?
- Divisibility 2
How many divisors has integer number 13?
- The number 3
Ski organizers should print the start numbers from 1 to 45. How many times will they use the number 3 when printing?
Petra has ten pairs of gloves in the closet. Six pairs are blue, 4 pairs are yellow. How many pieces of gloves need to be pulled out at least when she pull them out in the dark and want to have one complete one color pair?
- Rings - intersect
There are 15 pupils on the sporting ring. 10 pupils go to football, 8 pupils go to floorball. How many pupils go to both rings at the same time?
- Apples 3
Julka has 5 apples more than Hugo and four apples less than Annie. Hugo has 17 apples. How many apples has Julka and how Annie?
Francis went to buy ice lollies. If he buy 8 popsicles he missed 4 USD. When he buy 7 popsicles, got back 1 USD. How many USD was a popsicle?
- Unknown number 16
My number's tens is three times more then ones My number's ones is twice the number of thousands and my number's hundreds is half the number of of tens. I have two ones. which number am I?
- Seven times
Which number seven times is just as higher as 27, how much is smaller than 29?
Which number in division 16 give 12 and the rest 3?
- Write decimals
Write in the decimal system the short and advanced form of these numbers: a) four thousand seventy-nine b) five hundred and one thousand six hundred and ten c) nine million twenty-six
- Roman numerals
Write numbers written in Roman numerals as decimal.
Test what do you know about the subtraction of two numbers: a) make a difference if the minuend 4,307,288 and subtrahend is 472008 b) minuend is 4000 more than subtrahend. What's the difference? c) the difference is 38900 less than the minuend. What is th
The perpetrator is a number that is smaller than the number 80. It is a multiple of five and it is odd. If we added up the tens and ones of this number we get number 8.
Determine unknown number if you know that difference between five times and triple of number is 42.
- Addition of Roman numbers
Added together and write as decimal number: LXVII + MLXIV
Honza had three cages (black, silver, gold) and three animals (guinea pig, rat and puppy). There was one animal in each cage. The golden cage stood to the left of the black cage. The silver cage stood on the right of the guinea pig cage. The rat was in th